CVE-2026-68414 (GCVE-0-2026-68414)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-19 16:35
VLAI
Title
wifi: cfg80211: cancel sched scan results work on unregister
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel sched scan results work on unregister cfg80211_sched_scan_results() can queue rdev->sched_scan_res_wk from a driver result notification while a scheduled scan request is present. The work callback recovers the containing cfg80211_registered_device and then locks the wiphy and walks the scheduled-scan request list. wiphy_unregister() already makes the wiphy unreachable and drains rdev work items before cfg80211_dev_free() can release the object, but it does not drain sched_scan_res_wk. A queued or running result work item can therefore cross the unregister/free boundary and access freed rdev state. The buggy scenario involves two paths, with each column showing the order within that path: scheduled-scan result path: unregister/free path: 1. cfg80211_sched_scan_results() 1. interface teardown stops and queues rdev->sched_scan_res_wk. removes the scheduled scan request. 2. cfg80211_wq starts the work 2. wiphy_unregister() drains other item and recovers rdev. rdev work items. 3. The worker locks rdev->wiphy 3. cfg80211_dev_free() destroys and and walks rdev state. frees rdev. Cancel sched_scan_res_wk in wiphy_unregister() alongside the other rdev work items. cancel_work_sync() removes a pending result notification and waits for an already running callback, so cfg80211_dev_free() cannot free rdev while this work item is still active. Validation reproduced this kernel report: BUG: KASAN: use-after-free in cfg80211_sched_scan_results_wk+0x4a6/0x530 Workqueue: cfg80211 cfg80211_sched_scan_results_wk [cfg80211] Read of size 8 Call trace: dump_stack_lvl+0x66/0xa0 print_report+0xce/0x630 cfg80211_sched_scan_results_wk+0x4a6/0x530 srso_alias_return_thunk+0x5/0xfbef5 __virt_addr_valid+0x224/0x430 kasan_report+0xac/0xe0 lockdep_hardirqs_on_prepare+0xea/0x1a0 process_one_work+0x8d0/0x18f0 (kernel/workqueue.c:3212) lock_is_held_type+0x8f/0x100 worker_thread+0x5ad/0xfd0 __kthread_parkme+0xc6/0x200 kthread+0x31e/0x410 trace_hardirqs_on+0x1a/0x170 ret_from_fork+0x576/0x810 __switch_to+0x57e/0xe20 __switch_to_asm+0x33/0x70 ret_from_fork_asm+0x1a/0x30
Severity
7.5 (High)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 807f8a8c300435d5483e8d78df9dcdbc27333166 , < c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0 (git)
Affected: 807f8a8c300435d5483e8d78df9dcdbc27333166 , < b51b42b974461fd0f688baad85f10e2b8ab215c5 (git)
Affected: 807f8a8c300435d5483e8d78df9dcdbc27333166 , < 3368457b4871ae8f0f88d19c9a3e6270e850ede6 (git)
Affected: 807f8a8c300435d5483e8d78df9dcdbc27333166 , < 308ffdf575560d7e7b8b21f1e3ca6276630f73bf (git)
Affected: 807f8a8c300435d5483e8d78df9dcdbc27333166 , < 9293574ac208d18c11073538851fb69355beb3b5 (git)
Affected: 807f8a8c300435d5483e8d78df9dcdbc27333166 , < b119c70b24776c8ab2a2c0515397b3b0ad4e66cd (git)
Affected: 807f8a8c300435d5483e8d78df9dcdbc27333166 , < edf0730be33696a1bd142792830d392129e495cc (git)
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Linux Linux Affected: 3.0
Unaffected: 0 , < 3.0 (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "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-\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"
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          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "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\u0027s 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 \u2014 an unauthenticated attacker in range simply transmits beacons/probe responses matching the scheduled scan already running on the victim (started by the system\u0027s 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\u0027s 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 \u2014 mutex_lock on rdev-\u003ewiphy.mtx, spin_lock on rdev-\u003ebss_lock, clearing req-\u003ereport_results, and list/refcount manipulation in __cfg80211_bss_expire() \u2014 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."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:35:12.312Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/edf0730be33696a1bd142792830d392129e495cc"
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      "title": "wifi: cfg80211: cancel sched scan results work on unregister",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68414",
    "datePublished": "2026-08-10T12:04:34.459Z",
    "dateReserved": "2026-07-30T09:28:09.391Z",
    "dateUpdated": "2026-08-19T16:35:12.312Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2026-68414",
      "date": "2026-08-20",
      "epss": "0.00233",
      "percentile": "0.14427"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68414\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:35.117\",\"lastModified\":\"2026-08-19T17:20:49.063\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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-\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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/wireless/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"807f8a8c300435d5483e8d78df9dcdbc27333166\",\"lessThan\":\"c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"807f8a8c300435d5483e8d78df9dcdbc27333166\",\"lessThan\":\"b51b42b974461fd0f688baad85f10e2b8ab215c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"807f8a8c300435d5483e8d78df9dcdbc27333166\",\"lessThan\":\"3368457b4871ae8f0f88d19c9a3e6270e850ede6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"807f8a8c300435d5483e8d78df9dcdbc27333166\",\"lessThan\":\"308ffdf575560d7e7b8b21f1e3ca6276630f73bf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"807f8a8c300435d5483e8d78df9dcdbc27333166\",\"lessThan\":\"9293574ac208d18c11073538851fb69355beb3b5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"807f8a8c300435d5483e8d78df9dcdbc27333166\",\"lessThan\":\"b119c70b24776c8ab2a2c0515397b3b0ad4e66cd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"807f8a8c300435d5483e8d78df9dcdbc27333166\",\"lessThan\":\"edf0730be33696a1bd142792830d392129e495cc\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/wireless/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.6,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/308ffdf575560d7e7b8b21f1e3ca6276630f73bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3368457b4871ae8f0f88d19c9a3e6270e850ede6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9293574ac208d18c11073538851fb69355beb3b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b119c70b24776c8ab2a2c0515397b3b0ad4e66cd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b51b42b974461fd0f688baad85f10e2b8ab215c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/edf0730be33696a1bd142792830d392129e495cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T23:29:09+00:00",
      "cve": "CVE-2026-68414",
      "id": "CVE-2026-68414",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: cfg80211: cancel sched scan results work on unregister",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68414.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-11T23:46:07Z",
      "cve": "CVE-2026-68414",
      "id": "CVE-2026-68414",
      "initial_release_date": "2026-08-11T23:46:07Z",
      "product_status:known_affected": "197",
      "product_status:known_not_affected": "99",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68414",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68414.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.