SB2026021873 - Use-after-free in Linux kernel xfs scrub
Published: February 18, 2026
Security Bulletin ID
SB2026021873
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-2026-23223)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the xchk_btree_check_block_owner() function in fs/xfs/scrub/btree.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.