PT-2025-8849 · Linux+3 · Linux Kernel+3
Antoine Viallon
·
Published
2025-01-14
·
Updated
2025-05-28
·
CVE-2025-21737
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A memory leak issue has been identified in the Linux kernel, specifically in the
ceph mds auth match() function. This leak can occur when accessing files on a CephFS filesystem subdirectory with an auth token using a path-scoped capability, potentially leading to a rapid system crash due to continuous memory growth. The issue was detected in production and triggered kernel OOM, causing the kernel to hard-lock. Technical details include the allocation of a temporary target path substring, which was not freed on every possible branch, resulting in the memory leak.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Memory Leak
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linuxmint
Linux Kernel
Ubuntu