CVE-2026-31394

kernel: mac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · April 3, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's mac80211 component. This vulnerability occurs when processing stations on AP_VLAN interfaces, such as 4-address Wireless Distribution System (WDS) clients. An attacker could trigger a null pointer dereference during Channel Switch Announcement (CSA) operations, leading to a system crash and a Denial of Service (DoS).

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-476 · NULL Pointer Dereference