SB2025102360 - Improper locking in Linux kernel btrfs
Published: October 23, 2025 Updated: October 26, 2025
Security Bulletin ID
SB2025102360
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 security vulnerability.
1) Improper locking (CVE-ID: CVE-2022-50571)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the bitmap_clear_bits(), __load_free_space_cache(), load_free_space_cache() and __btrfs_return_cluster_to_free_space() functions in fs/btrfs/free-space-cache.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/819a61301275dcc573e3f520be3dc2c8531bee2d
- https://git.kernel.org/stable/c/8a1ae2781dee9fc21ca82db682d37bea4bd074ad
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.17
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1