CVE-2026-98862 (GCVE-0-2026-98862)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:51 – Updated: 2026-10-18 15:51
VLAI
Title
audit: fix exe mark UAF in kill_rules()
Summary
In the Linux kernel, the following vulnerability has been resolved: audit: fix exe mark UAF in kill_rules() kill_rules() removes mixed AUDIT_DIR and AUDIT_EXE rules when an audit tree is pruned. It drops entry->rule.exe before removing the rule from the RCU-visible filter lists. After a rule has been installed with AUDIT_ADD_RULE, which requires CAP_AUDIT_CONTROL, removing the watched directory can race with another task that is still evaluating the rule. In that case, fsnotify can free the executable mark before the reader reaches audit_mark_compare(), causing a use-after-free. KASAN reports: BUG: KASAN: slab-use-after-free in audit_mark_compare+0x8d/0xa0 Unlink the published rules from the RCU-visible lists and retain them on tree->rules for cleanup. If any rule has an executable mark, wait for a single RCU grace period before removing the marks and scheduling the entries for freeing. Otherwise, call_rcu() already provides the required deferred freeing without a synchronous wait.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7100 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 34d99af52ad40bd498ba66970579a5bc1fb1a3bc , < 304960900991157e6883bdf0b39782b690545ee8 (git)
Affected: 34d99af52ad40bd498ba66970579a5bc1fb1a3bc , < 88633025f20ba9c32ccdb3efc86eafdf98cb825c (git)
Affected: 34d99af52ad40bd498ba66970579a5bc1fb1a3bc , < f2cc5462b78559c7628a9f8ac9a9592e7783183a (git)
Affected: 34d99af52ad40bd498ba66970579a5bc1fb1a3bc , < aa650d87a498844060eecb1d336f4d46f4d1b0b3 (git)
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Linux Linux Affected: 4.3
Unaffected: 0 , < 4.3 (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc6 , ≤ * (original_commit_for_fix)
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    "dateReserved": "2026-09-25T10:25:14.376Z",
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}



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