{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68414", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.391Z", "datePublished": "2026-08-10T12:04:34.459Z", "dateUpdated": "2026-08-19T16:35:12.312Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:35:12.312Z" }, "descriptions": [ { "lang": "en", "value": "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 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" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The work item is queued from driver PNO/background-scan match notifications that are produced by received 802.11 frames, so an attacker within WiFi range can drive cfg80211_sched_scan_results() by beaconing SSIDs matching the device's scheduled-scan match set. This is 802.11 frame injection, i.e. adjacent network reach.\nAC:H - The UAF requires the result-notification work to be queued or running exactly while wiphy_unregister()/cfg80211_dev_free() tears the rdev down; the attacker can drive and time the result notifications but cannot force the device-removal/module-unload half of the race, which is a condition outside their control.\nPR:N - No credentials or association are needed — an unauthenticated attacker in range simply transmits beacons/probe responses matching the scheduled scan already running on the victim (started by the system's normal wpa_supplicant/NetworkManager PNO), and the driver notifies cfg80211 unconditionally.\nUI:N - Scheduled scan runs continuously in the background on typical laptop, phone and embedded WiFi deployments, and the unregister side is a system/device event; no victim action such as opening a file or mounting anything is required.\nS:U - The freed object and all corrupted state are cfg80211 kernel structures, so the impact stays within the kernel's own security authority with no crossing of a VM, IOMMU or sandbox boundary.\nC:H - The worker reads freed rdev memory and then feeds freed scheduled-scan request contents into nl80211_send_sched_scan(), leaking reclaimed slab data to userspace netlink listeners; a controlled reallocation of the freed rdev gives an arbitrary-read style disclosure primitive.\nI:H - After the free the worker performs writes into the freed object — mutex_lock on rdev->wiphy.mtx, spin_lock on rdev->bss_lock, clearing req->report_results, and list/refcount manipulation in __cfg80211_bss_expire() — which corrupts whatever object reclaims the slab and is leverageable for control-flow hijack via heap spraying.\nA:H - The confirmed KASAN use-after-free in cfg80211_sched_scan_results_wk() corrupts and dereferences freed memory from a workqueue context, reliably producing an oops/panic and taking down the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/wireless/core.c" ], "versions": [ { "version": "807f8a8c300435d5483e8d78df9dcdbc27333166", "lessThan": "c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0", "status": "affected", "versionType": "git" }, { "version": "807f8a8c300435d5483e8d78df9dcdbc27333166", "lessThan": "b51b42b974461fd0f688baad85f10e2b8ab215c5", "status": "affected", "versionType": "git" }, { "version": "807f8a8c300435d5483e8d78df9dcdbc27333166", "lessThan": "3368457b4871ae8f0f88d19c9a3e6270e850ede6", "status": "affected", "versionType": "git" }, { "version": "807f8a8c300435d5483e8d78df9dcdbc27333166", "lessThan": "308ffdf575560d7e7b8b21f1e3ca6276630f73bf", "status": "affected", "versionType": "git" }, { "version": "807f8a8c300435d5483e8d78df9dcdbc27333166", "lessThan": "9293574ac208d18c11073538851fb69355beb3b5", "status": "affected", "versionType": "git" }, { "version": "807f8a8c300435d5483e8d78df9dcdbc27333166", "lessThan": "b119c70b24776c8ab2a2c0515397b3b0ad4e66cd", "status": "affected", "versionType": "git" }, { "version": "807f8a8c300435d5483e8d78df9dcdbc27333166", "lessThan": "edf0730be33696a1bd142792830d392129e495cc", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/wireless/core.c" ], "versions": [ { "version": "3.0", "status": "affected" }, { "version": "0", "lessThan": "3.0", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "7.1.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "7.2" } ] } ] } ], "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" } ], "title": "wifi: cfg80211: cancel sched scan results work on unregister", "x_generator": { "engine": "bippy-1.2.0" } } } }