Race condition in Linux kernel - CVE-2026-31557
Published: April 25, 2026
Vulnerability identifier: #VU127832
CSH Severity: Low
CVSS v4.0: 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-2026-31557
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper synchronization in async event work handling on the nvmet workqueue when freeing an NVMe target controller during queue disconnect processing. A local user can trigger queue disconnect and controller cleanup to cause a denial of service.
The issue arises from recursive locking when async event work is flushed from the same worker processing nvmet-wq.
How to mitigate CVE-2026-31557
Install security update from vendor's repository.