---
id: CVE-2022-42720
title: >-
  Various refcounting bugs in the multi-BSS handling in the mac80211 stack in
  the Linux kernel 5.1 through 5.19.x before 5.19.16 could be used by local
  attackers (able to inject WLAN frames) to trigger use-after-free conditions to
  potentia…
summary: >-
  Various refcounting bugs in the multi-BSS handling in the mac80211 stack in
  the Linux kernel 5.1 through 5.19.x before 5.19.16 could be used by local
  attackers (able to inject WLAN frames) to trigger use-after-free conditions to
  potentia…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.1, < 5.4.218'
  - 'linux_kernel >= 5.5, < 5.10.148'
  - 'linux_kernel >= 5.11, < 5.15.74'
  - 'linux_kernel >= 5.16, < 5.19.16'
  - 'linux_kernel >= 6.0, < 6.0.2'
  - fedora = 36
  - fedora = 37
  - debian_linux = 10.0
  - debian_linux = 11.0
patched:
  - linux_kernel 6.0.2
published: '2022-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:16:51.560'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-42720'
references:
  - url: >-
      http://packetstormsecurity.com/files/169951/Kernel-Live-Patch-Security-Notice-LSN-0090-1.html
    label: cve@mitre.org
  - url: 'http://www.openwall.com/lists/oss-security/2022/10/13/5'
    label: cve@mitre.org
  - url: 'https://bugzilla.suse.com/show_bug.cgi?id=1204059'
    label: cve@mitre.org
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless.git/commit/?id=0b7808818cb9df6680f98996b8e9a439fa7bcc2f
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GGHENNMLCWIQV2LLA56BJNFIUZ7WB4IY/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2KTU5LFZNQS7YNGE56MT46VHMXL3DD2/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VNN3VFQPECS6D4PS6ZWD7AFXTOSJDSSR/
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20230203-0008/'
    label: cve@mitre.org
  - url: 'https://www.debian.org/security/2022/dsa-5257'
    label: cve@mitre.org
  - url: >-
      http://packetstormsecurity.com/files/169951/Kernel-Live-Patch-Security-Notice-LSN-0090-1.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2022/10/13/5'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.suse.com/show_bug.cgi?id=1204059'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless.git/commit/?id=0b7808818cb9df6680f98996b8e9a439fa7bcc2f
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GGHENNMLCWIQV2LLA56BJNFIUZ7WB4IY/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2KTU5LFZNQS7YNGE56MT46VHMXL3DD2/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VNN3VFQPECS6D4PS6ZWD7AFXTOSJDSSR/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20230203-0008/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2022/dsa-5257'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.009
epssPercentile: 0.58817
ingestedAt: '2026-10-14T19:49:57.520Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2025-05-15T20:46:43.901512Z'
---

## Overview

Various refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.x before 5.19.16 could be used by local attackers (able to inject WLAN frames) to trigger use-after-free conditions to potentially execute code.

## Affected

- `linux_kernel >= 5.1, < 5.4.218`
- `linux_kernel >= 5.5, < 5.10.148`
- `linux_kernel >= 5.11, < 5.15.74`
- `linux_kernel >= 5.16, < 5.19.16`
- `linux_kernel >= 6.0, < 6.0.2`
- `fedora = 36`
- `fedora = 37`
- `debian_linux = 10.0`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.0.2`