Updated: 2024-11-30 04:10:08.381017
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().
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0 | |
| CVSS Version 3.x | MEDIUM | 6.3 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 6.3 | MEDIUM | Needs Triage | 2024-11-12 11:58:37 | ||
| AlmaLinux 9.2 FIPS | kernel | 5.14.0 | 6.3 | MEDIUM | Ignored | 2024-09-16 12:22:58 | ||
| CentOS 6 ELS | kernel | 2.6.32 | 6.3 | MEDIUM | Ignored | 2024-09-16 12:22:58 | ||
| CentOS 7 ELS | kernel | 3.10.0 | 6.3 | MEDIUM | Ignored | 2024-09-16 12:22:57 | ||
| CentOS 8.4 ELS | kernel | 4.18.0 | 6.3 | MEDIUM | Ignored | 2024-09-24 05:35:53 | ||
| CentOS 8.5 ELS | kernel | 4.18.0 | 6.3 | MEDIUM | Ignored | 2024-09-24 05:35:53 | ||
| CentOS Stream 8 ELS | kernel | 4.18.0 | 6.3 | MEDIUM | Ignored | 2024-09-24 05:35:52 | ||
| CloudLinux 6 ELS | kernel | 2.6.32 | 6.3 | MEDIUM | Ignored | 2024-09-16 12:22:58 | ||
| CloudLinux 7 ELS | kernel | 3.10.0 | 6.3 | MEDIUM | Ignored | 2024-09-16 12:22:57 | ||
| Oracle Linux 6 ELS | kernel | 2.6.32 | 6.3 | MEDIUM | Ignored | 2024-09-16 12:22:57 |