Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c293621bbf678a3d85e3ed721c3921c8a670610d before d30ff33040834c3b9eee29740acd92f9c7ba2250; affected c293621bbf678a3d85e3ed721c3921c8a670610d before dc2ce1dfceaa0767211a9d963ddb029ab21c4235; affected c293621bbf678a3d85e3ed721c3921c8a670610d before 5661b9c7ec189406c2dde00837aaa4672efb6240; affected c293621bbf678a3d85e3ed721c3921c8a670610d before 52c87ab18c76c14d7209646ccb3283b3f5d87b22; affected c293621bbf678a3d85e3ed721c3921c8a670610d before ef8fc41cd6f95f9a4a3470f085aecf350569a0b3; affected c293621bbf678a3d85e3ed721c3921c8a670610d before 5f5d0799eb0a01d550c21b7894e26b2d9db55763; affected c293621bbf678a3d85e3ed721c3921c8a670610d before b6d223942c34057fdfd8f149e763fa823731b224; affected c293621bbf678a3d85e3ed721c3921c8a670610d before 3cad1bc010416c6dd780643476bc59ed742436b9 |
| Linux / Linux | affected 2.6.13; unaffected 0 before 2.6.13; unaffected 4.19.319 through 4.19.*; unaffected 5.4.281 through 5.4.*; unaffected 5.10.223 through 5.10.*; unaffected 5.15.164 through 5.15.*; unaffected 6.1.101 through 6.1.*; unaffected 6.6.42 through 6.6.*; unaffected 6.9.9 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d30ff33040834c3b9eee29740acd92f9c7ba2250
- https://git.kernel.org/stable/c/dc2ce1dfceaa0767211a9d963ddb029ab21c4235
- https://git.kernel.org/stable/c/5661b9c7ec189406c2dde00837aaa4672efb6240
- https://git.kernel.org/stable/c/52c87ab18c76c14d7209646ccb3283b3f5d87b22
- https://git.kernel.org/stable/c/ef8fc41cd6f95f9a4a3470f085aecf350569a0b3
- https://git.kernel.org/stable/c/5f5d0799eb0a01d550c21b7894e26b2d9db55763
- https://git.kernel.org/stable/c/b6d223942c34057fdfd8f149e763fa823731b224
- https://git.kernel.org/stable/c/3cad1bc010416c6dd780643476bc59ed742436b9
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/d30ff33040834c3b9eee29740acd92f9c7ba2250
- https://git.kernel.org/stable/c/dc2ce1dfceaa0767211a9d963ddb029ab21c4235
- https://git.kernel.org/stable/c/5661b9c7ec189406c2dde00837aaa4672efb6240
- https://git.kernel.org/stable/c/52c87ab18c76c14d7209646ccb3283b3f5d87b22
- https://git.kernel.org/stable/c/ef8fc41cd6f95f9a4a3470f085aecf350569a0b3
- https://git.kernel.org/stable/c/5f5d0799eb0a01d550c21b7894e26b2d9db55763
- https://git.kernel.org/stable/c/b6d223942c34057fdfd8f149e763fa823731b224
- https://git.kernel.org/stable/c/3cad1bc010416c6dd780643476bc59ed742436b9
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
No English description supplied.
No references supplied.