---
id: CVE-2026-31548
title: 'wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down

  When the nl80211 socket that originated a PMSR request is
  closed, cfg80211_release_pmsr() sets the reque…
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'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 <
    28d3551f8d8cb3aec7497894d94150fe84d20e5e
  - >-
    Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 <
    37e776e2e0a523731e2470dce6d563f0e8632a40
  - >-
    Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 <
    d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa
  - >-
    Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 <
    a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf
  - >-
    Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 <
    72b7ea786b8e570ae11149e9089859a4a8634a13
  - >-
    Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 <
    6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09
  - Linux 5.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:10:48.891822Z'
published: '2026-04-24'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:15.334Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-31548'
references:
  - url: 'https://git.kernel.org/stable/c/28d3551f8d8cb3aec7497894d94150fe84d20e5e'
  - url: 'https://git.kernel.org/stable/c/37e776e2e0a523731e2470dce6d563f0e8632a40'
  - url: 'https://git.kernel.org/stable/c/d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa'
  - url: 'https://git.kernel.org/stable/c/a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf'
  - url: 'https://git.kernel.org/stable/c/72b7ea786b8e570ae11149e9089859a4a8634a13'
  - url: 'https://git.kernel.org/stable/c/6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09'
tags:
  - cve.org
epss: 0.00176
epssPercentile: 0.0664
ingestedAt: '2026-10-16T17:24:46.660Z'
---

## Overview

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

wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down

When the nl80211 socket that originated a PMSR request is
closed, cfg80211_release_pmsr() sets the request's nl_portid
to zero and schedules pmsr_free_wk to process the abort
asynchronously. If the interface is concurrently torn down
before that work runs, cfg80211_pmsr_wdev_down() calls
cfg80211_pmsr_process_abort() directly. However, the already-
scheduled pmsr_free_wk work item remains pending and may run
after the interface has been removed from the driver. This
could cause the driver's abort_pmsr callback to operate on a
torn-down interface, leading to undefined behavior and
potential crashes.

Cancel pmsr_free_wk synchronously in cfg80211_pmsr_wdev_down()
before calling cfg80211_pmsr_process_abort(). This ensures any
pending or in-progress work is drained before interface teardown
proceeds, preventing the work from invoking the driver abort
callback after the interface is gone.

## Affected

- `Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 < 28d3551f8d8cb3aec7497894d94150fe84d20e5e`
- `Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 < 37e776e2e0a523731e2470dce6d563f0e8632a40`
- `Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 < d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa`
- `Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 < a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf`
- `Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 < 72b7ea786b8e570ae11149e9089859a4a8634a13`
- `Linux >= 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 < 6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09`
- `Linux 5.0`

## Remediation

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