Show plain JSON{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-40910", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.580Z", "datePublished": "2024-07-12T12:20:49.085Z", "dateUpdated": "2025-05-04T12:57:09.809Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T12:57:09.809Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nax25: Fix refcount imbalance on inbound connections\n\nWhen releasing a socket in ax25_release(), we call netdev_put() to\ndecrease the refcount on the associated ax.25 device. However, the\nexecution path for accepting an incoming connection never calls\nnetdev_hold(). This imbalance leads to refcount errors, and ultimately\nto kernel crashes.\n\nA typical call trace for the above situation will start with one of the\nfollowing errors:\n\n refcount_t: decrement hit 0; leaking memory.\n refcount_t: underflow; use-after-free.\n\nAnd will then have a trace like:\n\n Call Trace:\n <TASK>\n ? show_regs+0x64/0x70\n ? __warn+0x83/0x120\n ? refcount_warn_saturate+0xb2/0x100\n ? report_bug+0x158/0x190\n ? prb_read_valid+0x20/0x30\n ? handle_bug+0x3e/0x70\n ? exc_invalid_op+0x1c/0x70\n ? asm_exc_invalid_op+0x1f/0x30\n ? refcount_warn_saturate+0xb2/0x100\n ? refcount_warn_saturate+0xb2/0x100\n ax25_release+0x2ad/0x360\n __sock_release+0x35/0xa0\n sock_close+0x19/0x20\n [...]\n\nOn reboot (or any attempt to remove the interface), the kernel gets\nstuck in an infinite loop:\n\n unregister_netdevice: waiting for ax0 to become free. Usage count = 0\n\nThis patch corrects these issues by ensuring that we call netdev_hold()\nand ax25_dev_hold() for new connections in ax25_accept(). This makes the\nlogic leading to ax25_accept() match the logic for ax25_bind(): in both\ncases we increment the refcount, which is ultimately decremented in\nax25_release()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ax25/af_ax25.c"], "versions": [{"version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", "lessThan": "f4df9d6c8d4e4c818252b0419c2165d66eabd4eb", "status": "affected", "versionType": "git"}, {"version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", "lessThan": "52100fd74ad07b53a4666feafff1cd11436362d3", "status": "affected", "versionType": "git"}, {"version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", "lessThan": "a723a6c8d4831cc8e2c7b0c9f3f0c010d4671964", "status": "affected", "versionType": "git"}, {"version": "9fd75b66b8f68498454d685dc4ba13192ae069b0", "lessThan": "3c34fb0bd4a4237592c5ecb5b2e2531900c55774", "status": "affected", "versionType": "git"}, {"version": "c44a453ffe16eb08acdc6129ac4fa0192dbc0456", "status": "affected", "versionType": "git"}, {"version": "de55a1338e6a48ff1e41ea8db1432496fbe2a62b", "status": "affected", "versionType": "git"}, {"version": "9e1e088a57c23251f1cfe9601bbd90ade2ea73b9", "status": "affected", "versionType": "git"}, {"version": "b20a5ab0f5fb175750c6bafd4cf12daccf00c738", "status": "affected", "versionType": "git"}, {"version": "452ae92b99062d2f6a34324eaf705a3b7eac9f8b", "status": "affected", "versionType": "git"}, {"version": "534156dd4ed768e30a43de0036f45dca7c54818f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ax25/af_ax25.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.95", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.35", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9.6", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10", "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": "5.18", "versionEndExcluding": "6.1.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.9.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.277"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.240"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.190"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f4df9d6c8d4e4c818252b0419c2165d66eabd4eb"}, {"url": "https://git.kernel.org/stable/c/52100fd74ad07b53a4666feafff1cd11436362d3"}, {"url": "https://git.kernel.org/stable/c/a723a6c8d4831cc8e2c7b0c9f3f0c010d4671964"}, {"url": "https://git.kernel.org/stable/c/3c34fb0bd4a4237592c5ecb5b2e2531900c55774"}], "title": "ax25: Fix refcount imbalance on inbound connections", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:39:55.370Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/f4df9d6c8d4e4c818252b0419c2165d66eabd4eb", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/52100fd74ad07b53a4666feafff1cd11436362d3", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a723a6c8d4831cc8e2c7b0c9f3f0c010d4671964", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3c34fb0bd4a4237592c5ecb5b2e2531900c55774", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-40910", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:06:05.854978Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:37.278Z"}}]}}