CVE-2026-45895

kernel: quota: fix livelock between quotactl and freeze_super

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 27, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel. A local attacker could exploit a livelock condition between the quotactl and freeze_super operations. This occurs when a filesystem is frozen and the quotactl_block() function enters a retry loop, preventing the system from reaching an RCU (Read-Copy Update) quiescent state. This can lead to a system hang of the freezer process and 100% CPU utilization by the quota process, resulting in a Denial of Service (DoS).

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-835 · Loop with Unreachable Exit Condition ('Infinite Loop')