{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-53140", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-11-19T17:17:24.997Z", "datePublished": "2024-12-04T14:20:44.914Z", "dateUpdated": "2026-08-05T11:44:03.721Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:03.721Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: terminate outstanding dump on socket close\n\nNetlink supports iterative dumping of data. It provides the families\nthe following ops:\n - start - (optional) kicks off the dumping process\n - dump - actual dump helper, keeps getting called until it returns 0\n - done - (optional) pairs with .start, can be used for cleanup\nThe whole process is asynchronous and the repeated calls to .dump\ndon't actually happen in a tight loop, but rather are triggered\nin response to recvmsg() on the socket.\n\nThis gives the user full control over the dump, but also means that\nthe user can close the socket without getting to the end of the dump.\nTo make sure .start is always paired with .done we check if there\nis an ongoing dump before freeing the socket, and if so call .done.\n\nThe complication is that sockets can get freed from BH and .done\nis allowed to sleep. So we use a workqueue to defer the call, when\nneeded.\n\nUnfortunately this does not work correctly. What we defer is not\nthe cleanup but rather releasing a reference on the socket.\nWe have no guarantee that we own the last reference, if someone\nelse holds the socket they may release it in BH and we're back\nto square one.\n\nThe whole dance, however, appears to be unnecessary. Only the user\ncan interact with dumps, so we can clean up when socket is closed.\nAnd close always happens in process context. Some async code may\nstill access the socket after close, queue notification skbs to it etc.\nbut no dumps can start, end or otherwise make progress.\n\nDelete the workqueue and flush the dump state directly from the release\nhandler. Note that further cleanup is possible in -next, for instance\nwe now always call .done before releasing the main module reference,\nso dump doesn't have to take a reference of its own." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reached entirely through local syscalls — opening an AF_NETLINK socket, starting a dump, and registering it via mq_notify — with no network component.\nAC:L - Although triggering requires winning a lifetime race, the local attacker controls both sides (the outstanding dump, the extra reference holder via mqueue, and the socket close/reference drop) and syzkaller reproduced it, so success is reliable.\nPR:L - All required operations (AF_NETLINK socket, netlink dump, POSIX mqueue notification via mq_notify) are available to an ordinary unprivileged local user with no capabilities in the init namespace.\nUI:N - The attacker performs every step (start dump, attach reference, close socket) themselves; no victim action is required.\nS:U - The corruption stays within the kernel's own security authority; there is no VM/IOMMU/sandbox boundary crossed.\nC:H - The mismanaged socket reference lifetime is characterized as a use-after-free of a heap-allocated netlink_sock object, whose freed-then-reallocated contents an attacker can leverage to read sensitive kernel memory.\nI:H - The same use-after-free permits heap grooming and writes through a reallocated object, enabling memory corruption and potential control-flow hijacking.\nA:H - Executing the sleeping .done callback in atomic/BH context and the use-after-free reliably produce a kernel BUG/oops, deadlock, or panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netlink/af_netlink.c", "net/netlink/af_netlink.h" ], "versions": [ { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "114a61d8d94ae3a43b82446cf737fd757021b834", "status": "affected", "versionType": "git" }, { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "598c956b62699c3753929602560d8df322e60559", "status": "affected", "versionType": "git" }, { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "6e3f2c512d2b7dbd247485b1dd9e43e4210a18f4", "status": "affected", "versionType": "git" }, { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "d2fab3d66cc16cfb9e3ea1772abe6b79b71fa603", "status": "affected", "versionType": "git" }, { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "4e87a52133284afbd40fb522dbf96e258af52a98", "status": "affected", "versionType": "git" }, { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "bbc769d2fa1b8b368c5fbe013b5b096afa3c05ca", "status": "affected", "versionType": "git" }, { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "176c41b3ca9281a9736b67c6121b03dbf0c8c08f", "status": "affected", "versionType": "git" }, { "version": "ed5d7788a934a4b6d6d025e948ed4da496b4f12e", "lessThan": "1904fb9ebf911441f90a68e96b22aa73e4410505", "status": "affected", "versionType": "git" }, { "version": "baaf0c65bc8ea9c7a404b09bc8cc3b8a1e4f18df", "status": "affected", "versionType": "git" }, { "version": "25d9b4bb64ea964769087fc5ae09aee9c838d759", "status": "affected", "versionType": "git" }, { "version": "4.4.38", "lessThan": "4.5", "status": "affected", "versionType": "semver" }, { "version": "4.8.14", "lessThan": "4.9", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netlink/af_netlink.c", "net/netlink/af_netlink.h" ], "versions": [ { "version": "4.9", "status": "affected" }, { "version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.325", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.287", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.231", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.119", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.63", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.10", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "4.9", "versionEndExcluding": "4.19.325" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.1.119" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.6.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.11.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.38" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/114a61d8d94ae3a43b82446cf737fd757021b834" }, { "url": "https://git.kernel.org/stable/c/598c956b62699c3753929602560d8df322e60559" }, { "url": "https://git.kernel.org/stable/c/6e3f2c512d2b7dbd247485b1dd9e43e4210a18f4" }, { "url": "https://git.kernel.org/stable/c/d2fab3d66cc16cfb9e3ea1772abe6b79b71fa603" }, { "url": "https://git.kernel.org/stable/c/4e87a52133284afbd40fb522dbf96e258af52a98" }, { "url": "https://git.kernel.org/stable/c/bbc769d2fa1b8b368c5fbe013b5b096afa3c05ca" }, { "url": "https://git.kernel.org/stable/c/176c41b3ca9281a9736b67c6121b03dbf0c8c08f" }, { "url": "https://git.kernel.org/stable/c/1904fb9ebf911441f90a68e96b22aa73e4410505" } ], "title": "netlink: terminate outstanding dump on socket close", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:29:42.217Z" } } ] } }