#VU124484 Improper Locking in Linux kernel - CVE-2026-23355
Published: March 25, 2026
Vulnerability identifier: #VU124484
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23355
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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 security update from vendor's repository.