Answer in brief
CVE-2026-89643 records a Critical severity (CVSS 9.8) vulnerability in audit: avoid dropping live tree ref on fsnotify rule autoremove. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28 || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <636a99bab36ba27515363d325866c0273ac83b3e || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <583cf579b32d99e3fe4e9c8ecc4d852e3708fbec || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <783f0f0974c156aca630f4ffff248671082a098d | cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28, 636a99bab36ba27515363d325866c0273ac83b3e, 583cf579b32d99e3fe4e9c8ecc4d852e3708fbec, 783f0f0974c156aca630f4ffff248671082a098d |
| Linux/Linuxgeneric | 4.3 | Not reported |
| Linux/Linuxgeneric | >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <9cac21f8eb82675ed19fb955b8bbb9dd14cc3d58 || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <b322cc7adcd2e6ec1594d187533a126506ab545c || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <695c85dc345a4e0292739f004c261bedef3f27e6 || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <01b0ec8c397be65ff710777c97017ca1de56ef8e || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28 || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <636a99bab36ba27515363d325866c0273ac83b3e || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <583cf579b32d99e3fe4e9c8ecc4d852e3708fbec || >=34d99af52ad40bd498ba66970579a5bc1fb1a3bc <783f0f0974c156aca630f4ffff248671082a098d | 9cac21f8eb82675ed19fb955b8bbb9dd14cc3d58, b322cc7adcd2e6ec1594d187533a126506ab545c, 695c85dc345a4e0292739f004c261bedef3f27e6, 01b0ec8c397be65ff710777c97017ca1de56ef8e, cf37b61b5420fd4600fe78cf8c24da6e4d9bfe28, 636a99bab36ba27515363d325866c0273ac83b3e, 583cf579b32d99e3fe4e9c8ecc4d852e3708fbec, 783f0f0974c156aca630f4ffff248671082a098d |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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]
Quoted source text, attributed separately from HOL analysis.