wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down_CVE-2026-31548

{
    "lastseen": "",
    "description": "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's 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's 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.",
    "published": "2026-04-24T14:33:16.021Z",
    "modified": "2026-04-27T14:03:59.189Z",
    "type": "cve",
    "title": "wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/28d3551f8d8cb3aec7497894d94150fe84d20e5e\nhttps://git.kernel.org/stable/c/37e776e2e0a523731e2470dce6d563f0e8632a40\nhttps://git.kernel.org/stable/c/d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa\nhttps://git.kernel.org/stable/c/a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf\nhttps://git.kernel.org/stable/c/72b7ea786b8e570ae11149e9089859a4a8634a13\nhttps://git.kernel.org/stable/c/6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09",
    "id": "CVE-2026-31548",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 9bb7e0f24e7e7d00daa1219b14539e2e602649b2\nLinux Linux 9bb7e0f24e7e7d00daa1219b14539e2e602649b2\nLinux Linux 9bb7e0f24e7e7d00daa1219b14539e2e602649b2\nLinux Linux 9bb7e0f24e7e7d00daa1219b14539e2e602649b2\nLinux Linux 9bb7e0f24e7e7d00daa1219b14539e2e602649b2\nLinux Linux 9bb7e0f24e7e7d00daa1219b14539e2e602649b2\nLinux Linux 5.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "9bb7e0f24e7e7d00daa1219b14539e2e602649b2",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}