CVE-2024-26731 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54
https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8
https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26
https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949
https://lore.kernel.org/linux-cve-announce/2024040358-CVE-2024-26731-e084@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2024-26731
https://www.cve.org/CVERecord?id=CVE-2024-26731

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:6.8:rc1:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc2:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc3:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc4:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc5::::::
Vendors & Products		Linux Linux linux Kernel

Type	Values Removed	Values Added
Metrics	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'}`	cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}`

Show plain JSON

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}

Show plain JSON

{"bugzilla": {"description": "kernel: bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()", "id": "2273252", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2273252"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-362->CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()\nsyzbot reported the following NULL pointer dereference issue [1]:\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n[...]\nRIP: 0010:0x0\n[...]\nCall Trace:\n<TASK>\nsk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230\nunix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg+0x221/0x270 net/socket.c:745\n____sys_sendmsg+0x525/0x7d0 net/socket.c:2584\n___sys_sendmsg net/socket.c:2638 [inline]\n__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667\ndo_syscall_64+0xf9/0x240\nentry_SYSCALL_64_after_hwframe+0x6f/0x77\nIf sk_psock_verdict_data_ready() and sk_psock_stop_verdict() are called\nconcurrently, psock->saved_data_ready can be NULL, causing the above issue.\nThis patch fixes this issue by calling the appropriate data ready function\nusing the sk_psock_data_ready() helper and protecting it from concurrency\nwith sk->sk_callback_lock.", "A vulnerability was found in the Linux kernel, where a race condition is present between the  sk_psock_verdict_data_ready() and sk_psock_stop_verdict() functions. If the functions are called concurrently, the psock (packet socket) object which both access could be NULL, causing a NULL pointer dereference, leading to memory corruption or crashes."], "name": "CVE-2024-26731", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26731\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26731\nhttps://lore.kernel.org/linux-cve-announce/2024040358-CVE-2024-26731-e084@gregkh/T"], "statement": "Red Hat Enterprise Linux 8 and 9 are not affected by this vulnerability.", "threat_severity": "Moderate"}

{

bugzilla : { »

description : kernel: bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready() (string)

id : 2273252 (string)

url : https://bugzilla.redhat.com/show_bug.cgi?id=2273252 (string)

}

csaw : false (boolean)

cvss3 : { »

cvss3_base_score : 5.5 (string)

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

status : draft (string)

}

cwe : CWE-362->CWE-476 (string)

details : [ »

0 : In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready() syzbot reported the following NULL pointer dereference issue [1]: BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] RIP: 0010:0x0 [...] Call Trace: <TASK> sk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230 unix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 If sk_psock_verdict_data_ready() and sk_psock_stop_verdict() are called concurrently, psock->saved_data_ready can be NULL, causing the above issue. This patch fixes this issue by calling the appropriate data ready function using the sk_psock_data_ready() helper and protecting it from concurrency with sk->sk_callback_lock. (string)

1 : A vulnerability was found in the Linux kernel, where a race condition is present between the sk_psock_verdict_data_ready() and sk_psock_stop_verdict() functions. If the functions are called concurrently, the psock (packet socket) object which both access could be NULL, causing a NULL pointer dereference, leading to memory corruption or crashes. (string)

]

name : CVE-2024-26731 (string)

package_state : [ »

0 : { »

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