Improper locking in Linux kernel - CVE-2025-39885
Published: September 23, 2025
Vulnerability identifier: #VU116051
CSH Severity: Low
CVSS v4.0: 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-2025-39885
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the ocfs2_extent_map_get_blocks(), ocfs2_fiemap_inline() and ocfs2_fiemap() functions in fs/ocfs2/extent_map.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-39885
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/04100f775c2ea501927f508f17ad824ad1f23c8d
- https://git.kernel.org/stable/c/0709bc11b942870fc0a7be150e42aea42321093a
- https://git.kernel.org/stable/c/1d3c96547ee2ddeaddf8f19a3ef99ea06cc8115e
- https://git.kernel.org/stable/c/36054554772f95d090eb45793faf6aa3c0254b02
- https://git.kernel.org/stable/c/9efcb7a8b97310efed995397941a292cf89fa94f