{"id":"CVE-2026-68414","summary":"wifi: cfg80211: cancel sched scan results work on unregister","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel sched scan results work on unregister\n\ncfg80211_sched_scan_results() can queue rdev-\u003esched_scan_res_wk from a\ndriver result notification while a scheduled scan request is present. The\nwork callback recovers the containing cfg80211_registered_device and then\nlocks the wiphy and walks the scheduled-scan request list.\n\nwiphy_unregister() already makes the wiphy unreachable and drains rdev work\nitems before cfg80211_dev_free() can release the object, but it does not\ndrain sched_scan_res_wk. A queued or running result work item can therefore\ncross the unregister/free boundary and access freed rdev state.\n\nThe buggy scenario involves two paths, with each column showing the order\nwithin that path:\n\nscheduled-scan result path:        unregister/free path:\n1. cfg80211_sched_scan_results()   1. interface teardown stops and\n   queues rdev-\u003esched_scan_res_wk.    removes the scheduled scan request.\n2. cfg80211_wq starts the work     2. wiphy_unregister() drains other\n   item and recovers rdev.            rdev work items.\n3. The worker locks rdev-\u003ewiphy    3. cfg80211_dev_free() destroys and\n   and walks rdev state.              frees rdev.\n\nCancel sched_scan_res_wk in wiphy_unregister() alongside the other rdev\nwork items. cancel_work_sync() removes a pending result notification and\nwaits for an already running callback, so cfg80211_dev_free() cannot free\nrdev while this work item is still active.\n\nValidation reproduced this kernel report:\nBUG: KASAN: use-after-free in cfg80211_sched_scan_results_wk+0x4a6/0x530\nWorkqueue: cfg80211 cfg80211_sched_scan_results_wk [cfg80211]\nRead of size 8\nCall trace:\n  dump_stack_lvl+0x66/0xa0\n  print_report+0xce/0x630\n  cfg80211_sched_scan_results_wk+0x4a6/0x530\n  srso_alias_return_thunk+0x5/0xfbef5\n  __virt_addr_valid+0x224/0x430\n  kasan_report+0xac/0xe0\n  lockdep_hardirqs_on_prepare+0xea/0x1a0\n  process_one_work+0x8d0/0x18f0 (kernel/workqueue.c:3212)\n  lock_is_held_type+0x8f/0x100\n  worker_thread+0x5ad/0xfd0\n  __kthread_parkme+0xc6/0x200\n  kthread+0x31e/0x410\n  trace_hardirqs_on+0x1a/0x170\n  ret_from_fork+0x576/0x810\n  __switch_to+0x57e/0xe20\n  __switch_to_asm+0x33/0x70\n  ret_from_fork_asm+0x1a/0x30","modified":"2026-08-12T03:34:23.421156371Z","published":"2026-08-10T12:04:34.459Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68414.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/308ffdf575560d7e7b8b21f1e3ca6276630f73bf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3368457b4871ae8f0f88d19c9a3e6270e850ede6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9293574ac208d18c11073538851fb69355beb3b5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b119c70b24776c8ab2a2c0515397b3b0ad4e66cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/edf0730be33696a1bd142792830d392129e495cc"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68414.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68414"},{"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":"807f8a8c300435d5483e8d78df9dcdbc27333166"},{"fixed":"3368457b4871ae8f0f88d19c9a3e6270e850ede6"},{"fixed":"308ffdf575560d7e7b8b21f1e3ca6276630f73bf"},{"fixed":"9293574ac208d18c11073538851fb69355beb3b5"},{"fixed":"b119c70b24776c8ab2a2c0515397b3b0ad4e66cd"},{"fixed":"edf0730be33696a1bd142792830d392129e495cc"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68414.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68414.json"}}],"schema_version":"1.9.0"}