SB20251230172 - Use-after-free in Linux kernel btrfs
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230172
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2023-54185)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the load_free_space_bitmaps() and load_free_space_extents() functions in fs/btrfs/free-space-tree.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.