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CVE-2024-39476

kernel: md/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 5, 2024

Updated · June 28, 2026

Description

A vulnerability was found in the Linux kernel's md/raid5 implementation within the raid5d() function. This flaw can cause a deadlock when handling I/O operations due to a conflict between the reconfig_mutex and the MD_SB_CHANGE_PENDING flag, leading to excessive CPU usage and denial of service.

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

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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