CVE-2026-68414 (GCVE-0-2026-68414)
Vulnerability from cvelistv5
Published
2026-08-10 12:04
Modified
2026-08-19 16:35
Severity ?
7.5 (High) - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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
References
Impacted products
Vendor Product Version
Linux Linux Version: 807f8a8c300435d5483e8d78df9dcdbc27333166
Version: 807f8a8c300435d5483e8d78df9dcdbc27333166
Version: 807f8a8c300435d5483e8d78df9dcdbc27333166
Version: 807f8a8c300435d5483e8d78df9dcdbc27333166
Version: 807f8a8c300435d5483e8d78df9dcdbc27333166
Version: 807f8a8c300435d5483e8d78df9dcdbc27333166
Version: 807f8a8c300435d5483e8d78df9dcdbc27333166
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c0fa1f3a4b021a5c6373169fd6c9bb4261d676a0",
              "status": "affected",
              "version": "807f8a8c300435d5483e8d78df9dcdbc27333166",
              "versionType": "git"
            },
            {
              "lessThan": "b51b42b974461fd0f688baad85f10e2b8ab215c5",
              "status": "affected",
              "version": "807f8a8c300435d5483e8d78df9dcdbc27333166",
              "versionType": "git"
            },
            {
              "lessThan": "3368457b4871ae8f0f88d19c9a3e6270e850ede6",
              "status": "affected",
              "version": "807f8a8c300435d5483e8d78df9dcdbc27333166",
              "versionType": "git"
            },
            {
              "lessThan": "308ffdf575560d7e7b8b21f1e3ca6276630f73bf",
              "status": "affected",
              "version": "807f8a8c300435d5483e8d78df9dcdbc27333166",
              "versionType": "git"
            },
            {
              "lessThan": "9293574ac208d18c11073538851fb69355beb3b5",
              "status": "affected",
              "version": "807f8a8c300435d5483e8d78df9dcdbc27333166",
              "versionType": "git"
            },
            {
              "lessThan": "b119c70b24776c8ab2a2c0515397b3b0ad4e66cd",
              "status": "affected",
              "version": "807f8a8c300435d5483e8d78df9dcdbc27333166",
              "versionType": "git"
            },
            {
              "lessThan": "edf0730be33696a1bd142792830d392129e495cc",
              "status": "affected",
              "version": "807f8a8c300435d5483e8d78df9dcdbc27333166",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.0"
            },
            {
              "lessThan": "3.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "3.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "3.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "3.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "3.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "3.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "3.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "3.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "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"
          },
          "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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:35:12.312Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.