SB20260123106 - Use-after-free in Linux kernel btrfs
Published: January 23, 2026
Security Bulletin ID
SB20260123106
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-2025-71159)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the btrfs_get_or_create_delayed_node() function in fs/btrfs/delayed-inode.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.