CVE-2026-46153

kernel: 8021q: delete cleared egress QoS mappings

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 28, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's 8021q VLAN module. This vulnerability occurs because cleared egress Quality of Service (QoS) mappings are not properly deleted, leading to an accumulation of mapping nodes. An attacker could repeatedly set and clear egress priority mappings, causing a memory leak. This memory leak could eventually lead to a Denial of Service (DoS) condition, making the system unresponsive or unstable.

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime