CVE-2021-47069

kernel: ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry

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Severity

Moderate

Red Hat Product Security

5.8

CVSS 3.1

Review impact separately from score.

Published · March 1, 2024

Updated · November 2, 2026

Description

A flaw was found in the Linux kernel’s IPC system. This flaw allows an attacker to use a specially crafted program to cause a rare race condition, leading to a denial of service.

Statement

Red Hat Enterprise Linux 9 is not affected by this vulnerability.

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 · 5.8
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization