audit: fix exe mark UAF in kill_rules()
Summary
| CVE | CVE-2026-98862 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-18 16:17:40 UTC |
| Updated | 2026-10-21 13:21:50 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001570000 probability, percentile 0.044450000 (date 2026-10-21)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 34d99af52ad40bd498ba66970579a5bc1fb1a3bc 9aee3caeff4dd4126d84f67607b95cec8719b867 git | Not specified |
| CNA | Linux | Linux | affected 34d99af52ad40bd498ba66970579a5bc1fb1a3bc 304960900991157e6883bdf0b39782b690545ee8 git | Not specified |
| CNA | Linux | Linux | affected 34d99af52ad40bd498ba66970579a5bc1fb1a3bc 88633025f20ba9c32ccdb3efc86eafdf98cb825c git | Not specified |
| CNA | Linux | Linux | affected 34d99af52ad40bd498ba66970579a5bc1fb1a3bc f2cc5462b78559c7628a9f8ac9a9592e7783183a git | Not specified |
| CNA | Linux | Linux | affected 34d99af52ad40bd498ba66970579a5bc1fb1a3bc aa650d87a498844060eecb1d336f4d46f4d1b0b3 git | Not specified |
| CNA | Linux | Linux | affected 4.3 | Not specified |
| CNA | Linux | Linux | unaffected 4.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.160 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.113 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.56 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.10 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/aa650d87a498844060eecb1d336f4d46f4d1b0b3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f2cc5462b78559c7628a9f8ac9a9592e7783183a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/304960900991157e6883bdf0b39782b690545ee8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9aee3caeff4dd4126d84f67607b95cec8719b867 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/88633025f20ba9c32ccdb3efc86eafdf98cb825c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.