SB2026011436 - Use-after-free in Linux kernel btrfs
Published: January 14, 2026
Security Bulletin ID
SB2026011436
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2025-68778)
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 website.
References
- 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