CVE-2020-36691

kernel: lib/nlattr.c allows attackers to cause a denial of service

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Severity

Moderate

Red Hat Product Security

5.9

CVSS 3.1

Review impact separately from score.

Published · April 30, 2020

Updated · November 21, 2025

Description

A flaw was found in lib/nlattr.c in the Linux kernel, before 5.8. This issue may allow an attacker to cause a denial of service (unbounded recursion) through a nested Netlink policy with a back reference.

Statement

The affected code was not introduced into any kernel versions shipped with Red Hat Enterprise Linux; This vulnerability is not applicable to these platforms.

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 · 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-674 · Uncontrolled Recursion