CVE-2021-47237 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f
https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b
https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3
https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13
https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d
https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119
https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5
https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd
https://nvd.nist.gov/vuln/detail/CVE-2021-47237
https://www.cve.org/CVERecord?id=CVE-2021-47237

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Weaknesses		CWE-401
CPEs		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:5.13:rc1:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc2:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc3:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc4:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc5:::::: cpe:2.3:o:linux:linux_kernel:5.13:rc6::::::
Vendors & Products		Linux Linux linux Kernel
Metrics	cvssV3_1 `{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L'}`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Show plain JSON

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47237", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-04-10T18:59:19.531Z", "datePublished": "2024-05-21T14:19:38.396Z", "dateUpdated": "2025-05-04T07:06:54.347Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:06:54.347Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hamradio: fix memory leak in mkiss_close\n\nMy local syzbot instance hit memory leak in\nmkiss_open()[1]. The problem was in missing\nfree_netdev() in mkiss_close().\n\nIn mkiss_open() netdevice is allocated and then\nregistered, but in mkiss_close() netdevice was\nonly unregistered, but not freed.\n\nFail log:\n\nBUG: memory leak\nunreferenced object 0xffff8880281ba000 (size 4096):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00  ax0.............\n    00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00  .'.*............\n  backtrace:\n    [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n    [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880141a9a00 (size 96):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff  ...(.......(....\n    98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00  .....@..........\n  backtrace:\n    [<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310\n    [<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0\n    [<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0\n    [<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880219bfc00 (size 512):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff  ...(............\n    80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n    [<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff888029b2b200 (size 256):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n    [<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/hamradio/mkiss.c"], "versions": [{"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "c634ba0b4159838ff45a60d3a0ace3b4118077a5", "status": "affected", "versionType": "git"}, {"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "3942d0f9ace1a95a74930b5b4fc0e5005c62b37b", "status": "affected", "versionType": "git"}, {"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "765a8a04f828db7222b36a42b1031f576bfe95c3", "status": "affected", "versionType": "git"}, {"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "c16c4716a1b5ba4f83c7e00da457cba06761f119", "status": "affected", "versionType": "git"}, {"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "a49cbb762ef20655f5c91abdc13658b0af5e159d", "status": "affected", "versionType": "git"}, {"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "290b0b6432e2599021db0b8d6046f756d931c29f", "status": "affected", "versionType": "git"}, {"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "f4de2b43d13b7cf3ced9310e371b90c836dbd7cd", "status": "affected", "versionType": "git"}, {"version": "815f62bf742718458ba822a7e1f51f285eb997f2", "lessThan": "7edcc682301492380fbdd604b4516af5ae667a13", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/hamradio/mkiss.c"], "versions": [{"version": "2.6.14", "status": "affected"}, {"version": "0", "lessThan": "2.6.14", "status": "unaffected", "versionType": "semver"}, {"version": "4.4.274", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.9.274", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.238", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.196", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.128", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.46", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.13", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "4.4.274"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "4.9.274"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "4.14.238"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "4.19.196"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "5.4.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "5.10.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "5.12.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.14", "versionEndExcluding": "5.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5"}, {"url": "https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b"}, {"url": "https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3"}, {"url": "https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119"}, {"url": 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"https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47237", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:40:03.924521Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:12.722Z"}}]}}

{

dataType : CVE_RECORD (string)

dataVersion : 5.1 (string)

cveMetadata : { »

cveId : CVE-2021-47237 (string)

assignerOrgId : 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (string)

state : PUBLISHED (string)

assignerShortName : Linux (string)

dateReserved : 2024-04-10T18:59:19.531Z (string)

datePublished : 2024-05-21T14:19:38.396Z (string)

dateUpdated : 2025-05-04T07:06:54.347Z (string)

}

containers : { »

cna : { »

providerMetadata : { »

orgId : 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (string)

shortName : Linux (string)

dateUpdated : 2025-05-04T07:06:54.347Z (string)

}

descriptions : [ »

0 : { »

lang : en (string)

value : In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkiss_close My local syzbot instance hit memory leak in mkiss_open()[1]. The problem was in missing free_netdev() in mkiss_close(). In mkiss_open() netdevice is allocated and then registered, but in mkiss_close() netdevice was only unregistered, but not freed. Fail log: BUG: memory leak unreferenced object 0xffff8880281ba000 (size 4096): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880141a9a00 (size 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@.......... backtrace: [<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310 [<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0 [<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0 [<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880219bfc00 (size 512): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888029b2b200 (size 256): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae (string)

}

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affected : [ »

0 : { »

product : Linux (string)

vendor : Linux (string)

defaultStatus : unaffected (string)

repo : https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git (string)

programFiles : [ »

0 : drivers/net/hamradio/mkiss.c (string)

]

versions : [ »

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versionType : git (string)

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product : Linux (string)

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defaultStatus : affected (string)

repo : https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git (string)

programFiles : [ »

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]

versions : [ »

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1 : { »

version : 0 (string)

lessThan : 2.6.14 (string)

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0 : { »

url : https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5 (string)

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url : https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b (string)

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url : https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119 (string)

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4 : { »

url : https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d (string)

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5 : { »

url : https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f (string)

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6 : { »

url : https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd (string)

}

7 : { »

url : https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13 (string)

}

]

x_generator : { »

engine : bippy-5f407fcff5a0 (string)

}

descriptions : [ »

0 : { »

lang : en (string)

value : In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkiss_close My local syzbot instance hit memory leak in mkiss_open()[1]. The problem was in missing free_netdev() in mkiss_close(). In mkiss_open() netdevice is allocated and then registered, but in mkiss_close() netdevice was only unregistered, but not freed. Fail log: BUG: memory leak unreferenced object 0xffff8880281ba000 (size 4096): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880141a9a00 (size 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@.......... backtrace: [<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310 [<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0 [<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0 [<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880219bfc00 (size 512): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888029b2b200 (size 256): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae (string)

}

]

providerMetadata : { »

orgId : 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (string)

shortName : Linux (string)

dateUpdated : 2024-12-19T07:37:58.889Z (string)

}

cveMetadata : { »

cveId : CVE-2021-47237 (string)

state : PUBLISHED (string)

dateUpdated : 2024-12-19T07:37:58.889Z (string)

dateReserved : 2024-04-10T18:59:19.531Z (string)

assignerOrgId : 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (string)

datePublished : 2024-05-21T14:19:38.396Z (string)

assignerShortName : Linux (string)

}

dataVersion : 5.1 (string)

}

Show plain JSON

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "31B814DF-C8BD-4E58-9D36-9B770F38273B", "versionEndExcluding": "4.4.274", "versionStartIncluding": "2.6.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0A84D5BC-006F-41C5-A54D-6D45236009B3", "versionEndExcluding": "4.9.274", "versionStartIncluding": "4.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C3C0DBBF-0923-4D2A-9178-134691F9933F", "versionEndExcluding": "4.14.238", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F3CAB837-7D38-4934-AD4F-195CEFD754E6", "versionEndExcluding": "4.19.196", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6267BD4E-BE25-48B5-B850-4B493440DAFA", "versionEndExcluding": "5.4.128", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "59455D13-A902-42E1-97F7-5ED579777193", "versionEndExcluding": "5.10.46", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7806E7E5-6D4F-4E18-81C1-79B3C60EE855", "versionEndExcluding": "5.12.13", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*", "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*", "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*", "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*", "matchCriteriaId": "1ECD33F5-85BE-430B-8F86-8D7BD560311D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*", "matchCriteriaId": "CF351855-2437-4CF5-AD7C-BDFA51F27683", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*", "matchCriteriaId": "25A855BA-2118-44F2-90EF-EBBB12AF51EF", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hamradio: fix memory leak in mkiss_close\n\nMy local syzbot instance hit memory leak in\nmkiss_open()[1]. The problem was in missing\nfree_netdev() in mkiss_close().\n\nIn mkiss_open() netdevice is allocated and then\nregistered, but in mkiss_close() netdevice was\nonly unregistered, but not freed.\n\nFail log:\n\nBUG: memory leak\nunreferenced object 0xffff8880281ba000 (size 4096):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00  ax0.............\n    00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00  .'.*............\n  backtrace:\n    [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n    [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880141a9a00 (size 96):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff  ...(.......(....\n    98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00  .....@..........\n  backtrace:\n    [<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310\n    [<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0\n    [<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0\n    [<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880219bfc00 (size 512):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff  ...(............\n    80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n    [<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff888029b2b200 (size 256):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n    [<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80\n    [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n    [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n    [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n    [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n    [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n    [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n    [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: hamradio: corrige la p\u00e9rdida de memoria en mkiss_close. Mi instancia local de syzbot tuvo una p\u00e9rdida de memoria en mkiss_open()[1]. El problema estaba en que faltaba free_netdev() en mkiss_close(). En mkiss_open() el dispositivo de red se asigna y luego se registra, pero en mkiss_close() el dispositivo de red solo se anula del registro, pero no se libera. Registro de errores: ERROR: p\u00e9rdida de memoria, objeto sin referencia 0xffff8880281ba000 (tama\u00f1o 4096): comunicaci\u00f3n \"syz-executor.1\", pid 11443, santiam\u00e9n 4295046091 (edad 17,660 s) volcado hexadecimal (primeros 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*....... .... seguimiento: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x98/0xe80 [] mkiss_open+0xb2/0x6f0 [] tty_ldisc_open+0x9b/0x110 [ ] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR : p\u00e9rdida de memoria objeto sin referencia 0xffff8880141a9a00 (tama\u00f1o 96): comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (edad 17.660s) volcado hexadecimal (primeros 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@....... .. seguimiento: [] __hw_addr_create_ex+0x5b/0x310 [] __hw_addr_add_ex+0x1f8/0x2b0 [] f0 [] alloc_netdev_mqs+0x13b/0xe80 [] mkiss_open +0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR: p\u00e9rdida de memoria objeto sin referencia 0xffff8880219bfc00 (tama\u00f1o 512): comm \"syz-executor.1\", pid 11443, jiffies 95046091 (edad 17.660 a\u00f1os) volcado hexadecimal (primeros 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ rastreo inverso: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x777/0xe80 [] mkiss_open+0xb2 /0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR: p\u00e9rdida de memoria objeto 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value : In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkiss_close My local syzbot instance hit memory leak in mkiss_open()[1]. The problem was in missing free_netdev() in mkiss_close(). In mkiss_open() netdevice is allocated and then registered, but in mkiss_close() netdevice was only unregistered, but not freed. Fail log: BUG: memory leak unreferenced object 0xffff8880281ba000 (size 4096): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880141a9a00 (size 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@.......... backtrace: [<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310 [<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0 [<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0 [<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880219bfc00 (size 512): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888029b2b200 (size 256): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae (string)

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value : En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net: hamradio: corrige la pérdida de memoria en mkiss_close. Mi instancia local de syzbot tuvo una pérdida de memoria en mkiss_open()[1]. El problema estaba en que faltaba free_netdev() en mkiss_close(). En mkiss_open() el dispositivo de red se asigna y luego se registra, pero en mkiss_close() el dispositivo de red solo se anula del registro, pero no se libera. Registro de errores: ERROR: pérdida de memoria, objeto sin referencia 0xffff8880281ba000 (tamaño 4096): comunicación "syz-executor.1", pid 11443, santiamén 4295046091 (edad 17,660 s) volcado hexadecimal (primeros 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*....... .... seguimiento: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x98/0xe80 [] mkiss_open+0xb2/0x6f0 [] tty_ldisc_open+0x9b/0x110 [ ] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR : pérdida de memoria objeto sin referencia 0xffff8880141a9a00 (tamaño 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (edad 17.660s) volcado hexadecimal (primeros 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@....... .. seguimiento: [] __hw_addr_create_ex+0x5b/0x310 [] __hw_addr_add_ex+0x1f8/0x2b0 [] f0 [] alloc_netdev_mqs+0x13b/0xe80 [] mkiss_open +0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR: pérdida de memoria objeto sin referencia 0xffff8880219bfc00 (tamaño 512): comm "syz-executor.1", pid 11443, jiffies 95046091 (edad 17.660 años) volcado hexadecimal (primeros 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ rastreo inverso: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x777/0xe80 [] mkiss_open+0xb2 /0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR: pérdida de memoria objeto sin referencia 0xffff888029b2b200 (tamaño 256): comm "syz-executor.1", pid 11443, jiffies 046091 (edad 17.660 años) volcado hexadecimal (primero 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ rastreo inverso: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x912/0xe80 [] mkiss_open+0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+ 0x3a/0xb0 [] entrada_SYSCALL_64_after_hwframe+0x44/0xae (string)

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id : CVE-2021-47237 (string)

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Show plain JSON

{"bugzilla": {"description": "kernel: net: hamradio: fix memory leak in mkiss_close", "id": "2282580", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282580"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L", "status": "draft"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: hamradio: fix memory leak in mkiss_close\nMy local syzbot instance hit memory leak in\nmkiss_open()[1]. The problem was in missing\nfree_netdev() in mkiss_close().\nIn mkiss_open() netdevice is allocated and then\nregistered, but in mkiss_close() netdevice was\nonly unregistered, but not freed.\nFail log:\nBUG: memory leak\nunreferenced object 0xffff8880281ba000 (size 4096):\ncomm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\nhex dump (first 32 bytes):\n61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00  ax0.............\n00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00  .'.*............\nbacktrace:\n[<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n[<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80\n[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n[<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\nBUG: memory leak\nunreferenced object 0xffff8880141a9a00 (size 96):\ncomm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\nhex dump (first 32 bytes):\ne8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff  ...(.......(....\n98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00  .....@..........\nbacktrace:\n[<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310\n[<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0\n[<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0\n[<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80\n[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n[<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\nBUG: memory leak\nunreferenced object 0xffff8880219bfc00 (size 512):\ncomm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\nhex dump (first 32 bytes):\n00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff  ...(............\n80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00  ................\nbacktrace:\n[<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n[<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80\n[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n[<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae\nBUG: memory leak\nunreferenced object 0xffff888029b2b200 (size 256):\ncomm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\nhex dump (first 32 bytes):\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\nbacktrace:\n[<ffffffff81a27201>] kvmalloc_node+0x61/0xf0\n[<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80\n[<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1]\n[<ffffffff842355db>] tty_ldisc_open+0x9b/0x110\n[<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670\n[<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440\n[<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200\n[<ffffffff8911263a>] do_syscall_64+0x3a/0xb0\n[<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae"], "name": "CVE-2021-47237", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47237\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47237"], "threat_severity": "Low"}

{

bugzilla : { »

description : kernel: net: hamradio: fix memory leak in mkiss_close (string)

id : 2282580 (string)

url : https://bugzilla.redhat.com/show_bug.cgi?id=2282580 (string)

}

csaw : false (boolean)

cvss3 : { »

cvss3_base_score : 5.1 (string)

cvss3_scoring_vector : CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L (string)

status : draft (string)

}

cwe : CWE-402 (string)

details : [ »

0 : In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkiss_close My local syzbot instance hit memory leak in mkiss_open()[1]. The problem was in missing free_netdev() in mkiss_close(). In mkiss_open() netdevice is allocated and then registered, but in mkiss_close() netdevice was only unregistered, but not freed. Fail log: BUG: memory leak unreferenced object 0xffff8880281ba000 (size 4096): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880141a9a00 (size 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@.......... backtrace: [<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310 [<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0 [<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0 [<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880219bfc00 (size 512): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888029b2b200 (size 256): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae (string)

]

name : CVE-2021-47237 (string)

package_state : [ »

0 : { »

cpe : cpe:/o:redhat:enterprise_linux:6 (string)

fix_state : Out of support scope (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 6 (string)

}

1 : { »

cpe : cpe:/o:redhat:enterprise_linux:7 (string)

fix_state : Out of support scope (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 7 (string)

}

2 : { »

cpe : cpe:/o:redhat:enterprise_linux:7 (string)

fix_state : Out of support scope (string)

package_name : kernel-rt (string)

product_name : Red Hat Enterprise Linux 7 (string)

}

3 : { »

cpe : cpe:/o:redhat:enterprise_linux:8 (string)

fix_state : Not affected (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 8 (string)

}

4 : { »

cpe : cpe:/o:redhat:enterprise_linux:8 (string)

fix_state : Not affected (string)

package_name : kernel-rt (string)

product_name : Red Hat Enterprise Linux 8 (string)

}

5 : { »

cpe : cpe:/o:redhat:enterprise_linux:9 (string)

fix_state : Affected (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 9 (string)

}

6 : { »

cpe : cpe:/o:redhat:enterprise_linux:9 (string)

fix_state : Affected (string)

package_name : kernel-rt (string)

product_name : Red Hat Enterprise Linux 9 (string)

}

]

public_date : 2024-05-21T00:00:00Z (string)

references : [ »

0 : https://www.cve.org/CVERecord?id=CVE-2021-47237 https://nvd.nist.gov/vuln/detail/CVE-2021-47237 (string)

]

threat_severity : Low (string)

}

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

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