SB20260320104 - NULL Pointer Dereference in Linux kernel xfs scrub
Published: March 20, 2026
Security Bulletin ID
SB20260320104
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL Pointer Dereference (CVE-ID: CVE-2026-23249)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the XFS filesystem's btree revalidation functionality when handling ioctl requests. A local user can trigger a specially crafted ioctl request to cause a null pointer dereference and crash the system.
The attacker must have privileges to perform XFS filesystem scrub operations, which typically requires administrative privileges.
Remediation
Install update from vendor's website.