{"id":"CVE-2026-31548","summary":"wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down","details":"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.","modified":"2026-07-21T09:59:46.867392547Z","published":"2026-04-24T14:33:16.021Z","related":["SUSE-SU-2026:3130-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31548.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/28d3551f8d8cb3aec7497894d94150fe84d20e5e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/37e776e2e0a523731e2470dce6d563f0e8632a40"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09"},{"type":"WEB","url":"https://git.kernel.org/stable/c/72b7ea786b8e570ae11149e9089859a4a8634a13"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31548.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31548"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9bb7e0f24e7e7d00daa1219b14539e2e602649b2"},{"fixed":"28d3551f8d8cb3aec7497894d94150fe84d20e5e"},{"fixed":"37e776e2e0a523731e2470dce6d563f0e8632a40"},{"fixed":"d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa"},{"fixed":"a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf"},{"fixed":"72b7ea786b8e570ae11149e9089859a4a8634a13"},{"fixed":"6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31548.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.20"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31548.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}