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CVE-2021-47359

kernel: cifs: Fix soft lockup during fsstress

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Severity

Moderate

Red Hat Product Security

4.4

CVSS 3.1

Review impact separately from score.

Published · May 21, 2024

Updated · September 28, 2026

Description

A vulnerability was found in the Linux kernel’s Common Internet File System (CIFS) module during stress testing, where the system can become unresponsive. This issue occurs due to a soft lockup, where the CPU gets stuck for extended periods, causing the system to hang and become unresponsive.

Statement

This vulnerability is rated as a moderate severity because it does not compromise system security or expose data.

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

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

CVSS / CWE

CVSS 3.1 · 4.4
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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