CVE-2026-31548 (GCVE-0-2026-31548)
Vulnerability from cvelistv5
Published
2026-04-24 14:33
Modified
2026-04-27 14:03
Severity ?
VLAI Severity ?
EPSS score ?
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 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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 |
||
{
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"programFiles": [
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"status": "unaffected",
"version": "6.1.167",
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{
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"status": "unaffected",
"version": "6.6.130",
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{
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"status": "unaffected",
"version": "6.12.78",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.20",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down\n\nWhen the nl80211 socket that originated a PMSR request is\nclosed, cfg80211_release_pmsr() sets the request\u0027s nl_portid\nto zero and schedules pmsr_free_wk to process the abort\nasynchronously. If the interface is concurrently torn down\nbefore that work runs, cfg80211_pmsr_wdev_down() calls\ncfg80211_pmsr_process_abort() directly. However, the already-\nscheduled pmsr_free_wk work item remains pending and may run\nafter the interface has been removed from the driver. This\ncould cause the driver\u0027s abort_pmsr callback to operate on a\ntorn-down interface, leading to undefined behavior and\npotential crashes.\n\nCancel pmsr_free_wk synchronously in cfg80211_pmsr_wdev_down()\nbefore calling cfg80211_pmsr_process_abort(). This ensures any\npending or in-progress work is drained before interface teardown\nproceeds, preventing the work from invoking the driver abort\ncallback after the interface is gone."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-27T14:03:59.189Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
],
"title": "wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down",
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-31548",
"datePublished": "2026-04-24T14:33:16.021Z",
"dateReserved": "2026-03-09T15:48:24.114Z",
"dateUpdated": "2026-04-27T14:03:59.189Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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