Incomplete cleanup in Linux kernel - CVE-2026-90182
Published: September 19, 2026
Vulnerability identifier: #VU151301
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90182
CWE-ID: CWE-459
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to incomplete cleanup of delay state in the blk-iocost policy-data free handler when freeing I/O cost policy data after a block cgroup enters a delay state. A local user can trigger policy-data cleanup after the delay state is set to cause a denial of service.
The stale congestion state applies to every task in the affected block cgroup and its descendants.
Affected software
Linux kernel
How to mitigate CVE-2026-90182
Install security update from vendor's repository.