CVE-2025-68178

kernel: Linux kernel blk-cgroup: Denial of Service due to circular locking dependency

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 16, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel's blk-cgroup component. A local user could trigger a circular locking dependency, leading to a deadlock. This deadlock occurs when the queue_usage_counter is acquired while the rq_qos_mutex is already held, which can result in a Denial of Service (DoS) for the affected system.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-833 · Deadlock