298 lines
16 KiB
JSON
298 lines
16 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-89643",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-09-11T19:38:34.741Z",
|
|
"datePublished": "2026-09-11T19:45:35.523Z",
|
|
"dateUpdated": "2026-10-19T08:50:15.077Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-10-19T08:50:15.077Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\naudit: avoid dropping live tree ref on fsnotify rule autoremove\n\naudit_del_rule() is used for both netlink deletion templates and internal\nfsnotify autoremove. The former passes a parsed template which owns a\ntemporary tree reference; the latter passes the installed entry itself.\n\nThe unconditional audit_put_tree() at the end of audit_del_rule() assumes\nthe template case. For mixed AUDIT_DIR plus AUDIT_EXE rules, an fsnotify\nautoremove event therefore drops the installed rule's live tree reference.\nRepeating this across rules sharing the same tree can free the tree while\nanother rule still references it, and a later autoremove dereferences the\nfreed pathname while comparing rules.\n\nMove the temporary-tree put to audit_rule_change(), the caller that owns\ndeletion templates. Keep it in the AUDIT_DEL_RULE cleanup so both\nsuccessful deletion and -ENOENT still release the parser-owned tree.\n\n[PM: dropped unnecessary comment for line length reasons]"
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
|
|
"baseScore": 9.8,
|
|
"baseSeverity": "CRITICAL"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:N - audit_autoremove_mark_rule() runs from fsnotify FS_MOVE_SELF/FS_DELETE_SELF/FS_UNMOUNT on the AUDIT_EXE parent directory; nfsd and ksmbd vfs_rename/vfs_rmdir of that directory reach the same path over the network, not only local renameat/rmdir.\nAC:L - Each EXE fsnotify autoremove deterministically extra-puts the live shared audit_tree; the attacker issues sequential directory renames/rmdirs they fully control and needs no race or memory layout beyond their influence.\nPR:N - Triggering requires only renaming or rmdir'ing the parent directory of an audited executable on a local or NFS/SMB-exported path; a remote client needs no local account, CAP_AUDIT_CONTROL, or init-namespace root beyond export write access.\nUI:N - The attacker triggers autoremove with their own rename/rmdir (local or via nfsd/ksmbd); no other user must open files, mount a filesystem, or otherwise interact.\nS:U - The use-after-free corrupts host kernel heap (struct audit_tree) and stays within the same kernel security authority; it is not a VM escape, IOMMU bypass, or other documented cross-boundary impact.\nC:H - Use-after-free of the shared audit_tree lets a later audit_compare_rule() strcmp the freed pathname and remaining rules dereference attacker-reclaimed tree objects, enabling arbitrary kernel reads.\nI:H - The dangling tree is then used in audit_remove_tree_rule() list_del/list_move and prune_one() after extra puts free it, enabling heap spraying, list corruption, arbitrary writes, and control-flow hijack.\nA:H - Dereferencing the freed audit_tree pathname or underflowing its refcount during prune oopses/panics the kernel; the UAF can be triggered repeatedly for denial of service."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"kernel/auditfilter.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "9cac21f8eb82675ed19fb955b8bbb9dd14cc3d58",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "b322cc7adcd2e6ec1594d187533a126506ab545c",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "695c85dc345a4e0292739f004c261bedef3f27e6",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "01b0ec8c397be65ff710777c97017ca1de56ef8e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "636a99bab36ba27515363d325866c0273ac83b3e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "583cf579b32d99e3fe4e9c8ecc4d852e3708fbec",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
|
|
"lessThan": "783f0f0974c156aca630f4ffff248671082a098d",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"kernel/auditfilter.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "4.3",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "4.3",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.270",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.221",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.188",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.157",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.109",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.50",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.2.4",
|
|
"lessThanOrEqual": "7.2.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.3",
|
|
"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": "4.3",
|
|
"versionEndExcluding": "5.10.270"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.3",
|
|
"versionEndExcluding": "5.15.221"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.3",
|
|
"versionEndExcluding": "6.1.188"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.3",
|
|
"versionEndExcluding": "6.6.157"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.3",
|
|
"versionEndExcluding": "6.12.109"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.3",
|
|
"versionEndExcluding": "6.18.50"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.3",
|
|
"versionEndExcluding": "7.2.4"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.3",
|
|
"versionEndExcluding": "7.3"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/9cac21f8eb82675ed19fb955b8bbb9dd14cc3d58"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b322cc7adcd2e6ec1594d187533a126506ab545c"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/695c85dc345a4e0292739f004c261bedef3f27e6"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/01b0ec8c397be65ff710777c97017ca1de56ef8e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/636a99bab36ba27515363d325866c0273ac83b3e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/583cf579b32d99e3fe4e9c8ecc4d852e3708fbec"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/783f0f0974c156aca630f4ffff248671082a098d"
|
|
}
|
|
],
|
|
"title": "audit: avoid dropping live tree ref on fsnotify rule autoremove",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-89643",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "yes"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T19:24:59.658694Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-16T19:26:46.069Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |