SB20260105109 - Improper locking in Linux kernel block
Published: January 5, 2026
Security Bulletin ID
SB20260105109
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) Improper locking (CVE-ID: CVE-2025-68756)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the blk_mq_quiesce_tagset(), blk_mq_unquiesce_tagset(), blk_mq_del_queue_tag_set() and blk_mq_add_queue_tag_set() functions in block/blk-mq.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.