CVE Database›Document archive›CVE-2021-47451

CVE-2021-47451

kernel: netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 22, 2024

Updated · October 21, 2026

Description

A flaw was found in the Linux kernel netfilter IDLETIMER match. If timer_type is uninitialized, the match can panic the kernel. A local user who can install netfilter rules can crash the system.

Statement

Red Hat Enterprise Linux is not vulnerable to this CVE, as it does not affect the versions or configurations of the Linux kernel used in its distributions.

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-457 · Use of Uninitialized Variable