CVE-2026-53126

kernel: blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()

Loading…

Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · June 24, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's blk-cgroup component. This vulnerability occurs due to a missing disk reference release on an error path within the blkcg_maybe_throttle_current() function. When certain lookups or gets fail, the disk reference acquired is not properly freed. This oversight can lead to resource exhaustion, potentially allowing a local attacker to cause a Denial of Service (DoS) by preventing the disk from being released.

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-772 · Missing Release of Resource after Effective Lifetime