#VU121384 Use-after-free in Linux kernel - CVE-2025-68778
Published: January 14, 2026
Vulnerability identifier: #VU121384
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-68778
CWE-ID: CWE-416
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the conflicting_inode_is_dir(), add_conflicting_inode() and log_conflicting_inodes() functions in fs/btrfs/tree-log.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/266273eaf4d99475f1ae57f687b3e42bc71ec6f0
- https://git.kernel.org/stable/c/7359e1d39c78816ecbdb0cb4e93975794ce53973
- https://git.kernel.org/stable/c/a35788ddf8df65837897ecbb0ddb2896b863159e
- https://git.kernel.org/stable/c/d478f50727c3ee46d0359f0d2ae114f70191816e
- https://git.kernel.org/stable/c/d64f3834dffef80f0a9185a037617a54ed7f4bd2