CVE-2024-41049: filelock: fix potential use-after-free in posix_lock_inode

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-29 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: filelock: fix potential use-after-free in posix_lock_inode Light Hsieh reported a KASAN UAF warning in trace_posix_lock_inode(). The request pointer had been changed earlier to point to a lock entry that was added to the inode's list. However, before the tracepoint could fire, another task raced in and freed that lock. Fix this by moving the tracepoint inside the spinlock, which should ensure that this doesn't happen.

Affected products

Linux kernel: from 5.4.257 before 5.4.280; from 5.10.197 before 5.10.222; from 5.15.133 before 5.15.163; from 6.1.55 before 6.1.100; from 6.6 before 6.6.41; from 6.7 before 6.9.10 — fixed in 5.10.222, 5.15.163, 5.4.280, 6.1.100, 6.6.41, 6.9.10

How to fix

Upgrade to a fixed version: Linux kernel 5.10.222, 5.15.163, 5.4.280, 6.1.100. Check the vendor advisory for mitigations.

References

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