🛡️ CVE-2024-41012 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

filelock: Remove locks reliably when fcntl/close race is detected

In the Linux kernel, the following vulnerability has been resolved:

filelock: Remove locks reliably when fcntl/close race is detected

When fcntl_setlk() races with close(), it removes the created lock with

do_lock_file_wait().

However, LSMs can allow the first do_lock_file_wait() that created the lock

while denying the second do_lock_file_wait() that tries to remove the lock.

Separately, posix_lock_file() could also fail to

remove a lock due to GFP_KERNEL allocation failure (when splitting a range

in the middle).

After the bug has been triggered, use-after-free reads will occur in

lock_get_status() when userspace reads /proc/locks. This can likely be used

to read arbitrary kernel memory, but can't corrupt kernel memory.

Fix it by calling locks_remove_posix() instead, which is designed to

reliably get rid of POSIX locks associated with the given file and

files_struct and is also used by filp_flush().

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2024-41012 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.9.9)
  • linux-kernel

Timeline and source

Published on 23 July 2024 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
lists.debian.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2024-41012 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-07-23
Updated 2026-08-12
Modified 2026-08-06

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.9.9
linux-kernel — —

References

Similar Threats

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