SB20251226303 - Infinite loop in Linux kernel btrfs
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226303
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) Infinite loop (CVE-ID: CVE-2023-54121)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
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 infinite loop within the btrfs_drop_extent_map_range() function in fs/btrfs/extent_map.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/9f68e2105dd96cf0fafffffafb2337fbd0fbae1f
- https://git.kernel.org/stable/c/b43a4c99d878cf5e59040e45c96bb0a8358bfb3b
- https://git.kernel.org/stable/c/c962098ca4af146f2625ed64399926a098752c9c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.47
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5