#VU120561 Infinite loop in Linux kernel - CVE-2023-54121
Published: December 26, 2025 / Updated: December 31, 2025
Vulnerability identifier: #VU120561
Vulnerability risk: Low
CVSSv4.0: 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
CVE-ID: CVE-2023-54121
CWE-ID: CWE-835
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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 repository.
External links
- 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