VYPR
← All advisories
Unrated severityNVD Advisory· Published Jul 23, 2024· Updated Nov 3, 2025

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

CVE-2024-41012

Description

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().

Affected products

205

Patches

8
3cad1bc01041
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
b6d223942c34
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
5661b9c7ec18
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
52c87ab18c76
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
dc2ce1dfceaa
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
d30ff3304083
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
5f5d0799eb0a
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
ef8fc41cd6f9
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit

Vulnerability mechanics

Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

8

News mentions

0

No linked articles in our index yet.