SB2026032586 - Improper Locking in Linux kernel ata driver
Published: March 25, 2026
Security Bulletin ID
SB2026032586
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-2026-23355)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper synchronization in the ATA subsystem when handling deferred SCSI commands. A local user can trigger command processing that leads to a system warning and potential disruption in storage operations.
The issue arises when pending work is not canceled after clearing deferred_qc, allowing stale work to execute in an invalid context, which results in a WARN_ON() and possible denial of service.
Remediation
Install update from vendor's website.