CVE-2026-74512

In the Linux kernel, the following vulnerability has been resolved: audit: fix potential use-after-free in audit_del_rule() `audit_del_rule()` destroys `e->rule.exe` via `audit_remove_mark_rule()` before unlinking the rule from RCU-visible filter lists and waiting for a grace period. Concurrent readers in `audit_filter()` and `audit_filter_rules()` still dereference `e->rule.exe`, while the fsnotify mark can be freed on an independent lifetime path. This creates a use-after-free window during rule deletion. Fix this by unlinking the rule from the RCU-visible lists and invoking `synchronize_rcu()` before calling `audit_remove_mark_rule()` (and other rule removal helpers). This ensures that all existing RCU readers have exited the critical section before any underlying resources are destroyed.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/246df90b5f1a8a6e6abbd2f058b029558720adec
https://git.kernel.org/stable/c/3f82927b399d7a276c0c12b6ff4424b747a0c9a7
https://git.kernel.org/stable/c/45bf3df5b32e5a49953e7ceabc55f7dd85380e46
https://git.kernel.org/stable/c/5b8f46864f06d6dbacb7dcea52bc084dfd122638
https://git.kernel.org/stable/c/78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf
https://git.kernel.org/stable/c/8ae135a8962be9d4e8a131eb18eb06cdf02a47ce
https://git.kernel.org/stable/c/93616c567469510b7bba55b2674e0c4523fd7e64
https://git.kernel.org/stable/c/cae0dfed5d307b240bff71c3cf206652d1b6f215

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 13:17

Updated : 2026-08-19 17:21

NVD link : CVE-2026-74512

Mitre link : CVE-2026-74512

CVE.ORG link : CVE-2026-74512

JSON object : View

Products Affected

No product.

CWE

No CWE.

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Concurrent readers in `audit_filter()` and\n`audit_filter_rules()` still dereference `e->rule.exe`, while the fsnotify\nmark can be freed on an independent lifetime path. This creates a\nuse-after-free window during rule deletion.\n\nFix this by unlinking the rule from the RCU-visible lists and invoking\n`synchronize_rcu()` before calling `audit_remove_mark_rule()` (and other\nrule removal helpers). This ensures that all existing RCU readers have\nexited the critical section before any underlying resources are destroyed."}], "lastModified": "2026-08-19T17:21:07.980", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}