SB2026091933 - Incomplete cleanup in Linux kernel block

Description

This security bulletin contains information about 1 vulnerability.

1) Incomplete cleanup (CVE-ID: CVE-2026-90182)

CWE-ID: CWE-459 - Incomplete cleanup

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/97cb95d2148835ae86ff916b145aef332d40439d
• https://git.kernel.org/stable/c/b9c16db833e3ff15d923282f94dddf0e10fab8c0