Improper locking in Linux kernel - CVE-2026-43309
Published: May 9, 2026
Vulnerability identifier: #VU130875
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43309
CWE-ID: CWE-667
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 state management in the dm-raid target when stopping a RAID array after suspending the device tree from top to bottom and removing the top-level RAID device. A local user can stop and remove a crafted dm-raid managed array to cause a denial of service.
The issue results in an indefinite block because write-intent bitmap operations are attempted against already suspended metadata devices.
How to mitigate CVE-2026-43309
Install security update from vendor's repository.