CVE-2026-89643
CVE CVE-2026-89643EUVD EUVD-2026-76555Published 2026-09-11T19:45:35.000ZLast changed 2026-09-14T12:01:43.000ZCVSS 9.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: audit: avoid dropping live tree ref on fsnotify rule autoremove audit_del_rule() is used for both netlink deletion templates and internal fsnotify autoremove. The former passes a parsed template which owns a temporary tree reference; the latter passes the installed entry itself. The unconditional audit_put_tree() at the end of audit_del_rule() assumes the template case. For mixed AUDIT_DIR plus AUDIT_EXE rules, an fsnotify autoremove event therefore drops the installed rule's live tree reference. Repeating this across rules sharing the same tree can free the tree while another rule still references it, and a later autoremove dereferences the freed pathname while comparing rules. Move the temporary-tree put to audit_rule_change(), the caller that owns deletion templates. Keep it in the AUDIT_DEL_RULE cleanup so both successful deletion and -ENOENT still release the parser-owned tree. [PM: dropped unnecessary comment for line length reasons]
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.6.157; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <783f0f0974c156aca630f4ffff248671082a098d; 4.3; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <01b0ec8c397be65ff710777c97017ca1de56ef8e; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <9cac21f8eb82675ed19fb955b8bbb9dd14cc3d58; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <636a99bab36ba27515363d325866c0273ac83b3e; patch: 6.12.109; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <583cf579b32d99e3fe4e9c8ecc4d852e3708fbec; patch: 7.2.4; patch: 6.18.50; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <695c85dc345a4e0292739f004c261bedef3f27e6; patch: 0; patch: 5.10.270; patch: 6.1.188; patch: 5.15.221; 34d99af52ad40bd498ba66970579a5bc1fb1a3bc <b322cc7adcd2e6ec1594d187533a126506ab545c; patch: 7.3-rc1
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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