Use-after-free in Linux kernel - CVE-2025-68226
Published: December 16, 2025
Vulnerability identifier: #VU120026
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-68226
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the cfids_invalidation_worker() function in fs/smb/client/cached_dir.c. A local user can escalate privileges on the system.
Affected software
Linux kernel
How to mitigate CVE-2025-68226
Install update from vendor's repository.