{"id":"CVE-2026-68414","title":"wifi: cfg80211: cancel sched scan results work on unregister","summary":"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->sched_scan_res_wk from a\ndriver result notification while a …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0","Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < b51b42b974461fd0f688baad85f10e2b8ab215c5","Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < 3368457b4871ae8f0f88d19c9a3e6270e850ede6","Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < 308ffdf575560d7e7b8b21f1e3ca6276630f73bf","Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < 9293574ac208d18c11073538851fb69355beb3b5","Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < b119c70b24776c8ab2a2c0515397b3b0ad4e66cd","Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < edf0730be33696a1bd142792830d392129e495cc","Linux 3.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:48:28.206638Z"},"published":"2026-08-10","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:53:12.490Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68414","references":[{"url":"https://git.kernel.org/stable/c/c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0"},{"url":"https://git.kernel.org/stable/c/b51b42b974461fd0f688baad85f10e2b8ab215c5"},{"url":"https://git.kernel.org/stable/c/3368457b4871ae8f0f88d19c9a3e6270e850ede6"},{"url":"https://git.kernel.org/stable/c/308ffdf575560d7e7b8b21f1e3ca6276630f73bf"},{"url":"https://git.kernel.org/stable/c/9293574ac208d18c11073538851fb69355beb3b5"},{"url":"https://git.kernel.org/stable/c/b119c70b24776c8ab2a2c0515397b3b0ad4e66cd"},{"url":"https://git.kernel.org/stable/c/edf0730be33696a1bd142792830d392129e495cc"}],"tags":["cve.org"],"epss":0.0023,"epssPercentile":0.12814,"ingestedAt":"2026-10-16T17:24:46.864Z","slug":"CVE-2026-68414","body":"## Overview\n\nIn 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->sched_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->sched_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->wiphy    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\n\n## Affected\n\n- `Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0`\n- `Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < b51b42b974461fd0f688baad85f10e2b8ab215c5`\n- `Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < 3368457b4871ae8f0f88d19c9a3e6270e850ede6`\n- `Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < 308ffdf575560d7e7b8b21f1e3ca6276630f73bf`\n- `Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < 9293574ac208d18c11073538851fb69355beb3b5`\n- `Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < b119c70b24776c8ab2a2c0515397b3b0ad4e66cd`\n- `Linux >= 807f8a8c300435d5483e8d78df9dcdbc27333166 < edf0730be33696a1bd142792830d392129e495cc`\n- `Linux 3.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}