Vulnerability 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().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.13, < 4.19.319 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/3cad1bc010416c6dd780643476bc59ed742436b9Patch
- https://git.kernel.org/stable/c/52c87ab18c76c14d7209646ccb3283b3f5d87b22Patch
- https://git.kernel.org/stable/c/5661b9c7ec189406c2dde00837aaa4672efb6240Patch
- https://git.kernel.org/stable/c/5f5d0799eb0a01d550c21b7894e26b2d9db55763Patch
- https://git.kernel.org/stable/c/b6d223942c34057fdfd8f149e763fa823731b224Patch
- https://git.kernel.org/stable/c/d30ff33040834c3b9eee29740acd92f9c7ba2250Patch
- https://git.kernel.org/stable/c/dc2ce1dfceaa0767211a9d963ddb029ab21c4235Patch
- https://git.kernel.org/stable/c/ef8fc41cd6f95f9a4a3470f085aecf350569a0b3Patch
- https://git.kernel.org/stable/c/3cad1bc010416c6dd780643476bc59ed742436b9Patch
- https://git.kernel.org/stable/c/52c87ab18c76c14d7209646ccb3283b3f5d87b22Patch
- https://git.kernel.org/stable/c/5661b9c7ec189406c2dde00837aaa4672efb6240Patch
- https://git.kernel.org/stable/c/5f5d0799eb0a01d550c21b7894e26b2d9db55763Patch
- https://git.kernel.org/stable/c/b6d223942c34057fdfd8f149e763fa823731b224Patch
- https://git.kernel.org/stable/c/d30ff33040834c3b9eee29740acd92f9c7ba2250Patch
- https://git.kernel.org/stable/c/dc2ce1dfceaa0767211a9d963ddb029ab21c4235Patch
FAQ
What is CVE-2024-41012?
CVE-2024-41012 is a vulnerability with a CVSS score of 6.3 (MEDIUM). 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 lo...
How severe is CVE-2024-41012?
CVE-2024-41012 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-41012?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.