---
id: CVE-2023-53113
title: 'wifi: nl80211: fix NULL-ptr deref in offchan check'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: nl80211: fix NULL-ptr deref in offchan check

  If, e.g. in AP mode, the link was already created by userspace
  but not activated yet, it has a chandef but the chand…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 <
    87e80ea4fbc9ce2f2005905fdbcd38baaa47463a
  - >-
    Linux >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 <
    201a836c2385fdd2b9d0a8e7737bba5b26f1863a
  - >-
    Linux >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 <
    f624bb6fad23df3270580b4fcef415c6e7bf7705
  - Linux 7a53ad13c09150076b7ddde96c2dfc5622c90b45
  - Linux >= 5.19.2 < 5.20
  - Linux 6.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:17:43.617434Z'
published: '2025-05-02'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:21:02.019Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-53113'
references:
  - url: 'https://git.kernel.org/stable/c/87e80ea4fbc9ce2f2005905fdbcd38baaa47463a'
  - url: 'https://git.kernel.org/stable/c/201a836c2385fdd2b9d0a8e7737bba5b26f1863a'
  - url: 'https://git.kernel.org/stable/c/f624bb6fad23df3270580b4fcef415c6e7bf7705'
tags:
  - cve.org
epss: 0.00201
epssPercentile: 0.10026
ingestedAt: '2026-11-05T22:38:31.771Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

wifi: nl80211: fix NULL-ptr deref in offchan check

If, e.g. in AP mode, the link was already created by userspace
but not activated yet, it has a chandef but the chandef isn't
valid and has no channel. Check for this and ignore this link.

## Affected

- `Linux >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 < 87e80ea4fbc9ce2f2005905fdbcd38baaa47463a`
- `Linux >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 < 201a836c2385fdd2b9d0a8e7737bba5b26f1863a`
- `Linux >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 < f624bb6fad23df3270580b4fcef415c6e7bf7705`
- `Linux 7a53ad13c09150076b7ddde96c2dfc5622c90b45`
- `Linux >= 5.19.2 < 5.20`
- `Linux 6.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.