SB20251226212 - NULL pointer dereference in Linux kernel md driver
Published: December 26, 2025
Security Bulletin ID
SB20251226212
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-2025-68368)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the mddev_clear_bitmap_ops(), mddev_init(), md_run() and __md_stop() functions in drivers/md/md.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.