SB20251226239 - Improper locking in Linux kernel btrfs
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226239
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper locking (CVE-ID: CVE-2023-54067)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the btrfs_delete_free_space_tree() function in fs/btrfs/free-space-tree.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/6f1c81886b0b56cb88b311e5d2f203625474d892
- https://git.kernel.org/stable/c/8ce9139aea5e60a247bde5af804312f54975f443
- https://git.kernel.org/stable/c/babebf023e661b90b1c78b2baa384fb03a226879
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.39
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5