CVE-2026-80762 (GCVE-0-2026-80762)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-10-19 08:43
VLAI
Title
Bluetooth: hci_sync: Fix accept list UAF during suspend
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix accept list UAF during suspend hci_update_event_filter_sync() walks hdev->accept_list while sending a synchronous HCI command for each remote-wakeup device. The suspend path holds hdev->req_lock, but accept-list updates are serialized by hdev->lock. Consequently, remove_device() can free the current list entry during the controller wait. The following interleaving causes the use-after-free: hci_update_event_filter_sync() remove_device() fetch accept-list entry hci_set_event_filter_sync() wait for controller response hci_dev_lock() list_del() kfree() hci_dev_unlock() read the freed list.next KASAN reported: BUG: KASAN: slab-use-after-free in hci_suspend_sync+0x835/0x910 Read of size 8 at addr ffff88810bec8440 by task kworker/0:1/10 Workqueue: events vhci_suspend_work Call Trace: hci_suspend_sync+0x835/0x910 hci_suspend_dev+0x182/0x450 process_one_work+0x661/0x1090 worker_thread+0x45b/0xd10 Allocated by task 86: hci_bdaddr_list_add_with_flags+0x1a8/0x400 add_device+0x381/0x820 hci_sock_sendmsg+0x1033/0x1ea0 Freed by task 91: kfree+0x131/0x3c0 remove_device+0x429/0xb70 hci_sock_sendmsg+0x1033/0x1ea0 Snapshot the remote-wakeup addresses under hdev->lock. Release the lock before sending HCI commands. Clear the controller event filter before building the snapshot, and skip allocation and the second list traversal when there are no matching entries. This preserves the original filter and scan-state updates without retaining an accept-list node across a controller wait.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 182ee45da083db4e3e621541ccf255bfa9652214 , < bb5f5414d1a6272a16f68684e998f4063dd19f57 (git)
Affected: 182ee45da083db4e3e621541ccf255bfa9652214 , < b5181516a9f5c2fdb3271cdad72a5b16c6963a44 (git)
Affected: 182ee45da083db4e3e621541ccf255bfa9652214 , < 87ad116ac3abc6f2ce2b5b6c488f633003581eee (git)
Affected: 182ee45da083db4e3e621541ccf255bfa9652214 , < fe93a697a7a92fa9adf78c9ff67a10db3193290c (git)
Affected: 182ee45da083db4e3e621541ccf255bfa9652214 , < 95bb57bc11a91caf042ad00fca85e480d3fda37f (git)
Affected: 182ee45da083db4e3e621541ccf255bfa9652214 , < 29c59212a507804d7616b8abf491d30b4ab8e75f (git)
Affected: 182ee45da083db4e3e621541ccf255bfa9652214 , < f57b399c4fa1501b2d5451f52d861ece86bcf3db (git)
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Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.187 , ≤ 6.1.* (semver)
Unaffected: 6.6.156 , ≤ 6.6.* (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix accept list UAF during suspend\n\nhci_update_event_filter_sync() walks hdev-\u003eaccept_list while sending a\nsynchronous HCI command for each remote-wakeup device.  The suspend path\nholds hdev-\u003ereq_lock, but accept-list updates are serialized by hdev-\u003elock.\nConsequently, remove_device() can free the current list entry during the\ncontroller wait.\n\nThe following interleaving causes the use-after-free:\n\n  hci_update_event_filter_sync()    remove_device()\n  fetch accept-list entry\n  hci_set_event_filter_sync()\n    wait for controller response    hci_dev_lock()\n                                    list_del()\n                                    kfree()\n                                    hci_dev_unlock()\n  read the freed list.next\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in hci_suspend_sync+0x835/0x910\n  Read of size 8 at addr ffff88810bec8440 by task kworker/0:1/10\n  Workqueue: events vhci_suspend_work\n  Call Trace:\n   hci_suspend_sync+0x835/0x910\n   hci_suspend_dev+0x182/0x450\n   process_one_work+0x661/0x1090\n   worker_thread+0x45b/0xd10\n\n  Allocated by task 86:\n   hci_bdaddr_list_add_with_flags+0x1a8/0x400\n   add_device+0x381/0x820\n   hci_sock_sendmsg+0x1033/0x1ea0\n\n  Freed by task 91:\n   kfree+0x131/0x3c0\n   remove_device+0x429/0xb70\n   hci_sock_sendmsg+0x1033/0x1ea0\n\nSnapshot the remote-wakeup addresses under hdev-\u003elock.  Release the lock\nbefore sending HCI commands.  Clear the controller event filter before\nbuilding the snapshot, and skip allocation and the second list traversal\nwhen there are no matching entries.  This preserves the original filter\nand scan-state updates without retaining an accept-list node across a\ncontroller wait."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:43:18.848Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/bb5f5414d1a6272a16f68684e998f4063dd19f57"
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        },
        {
          "url": "https://git.kernel.org/stable/c/f57b399c4fa1501b2d5451f52d861ece86bcf3db"
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      "title": "Bluetooth: hci_sync: Fix accept list UAF during suspend",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80762",
    "datePublished": "2026-09-04T15:12:34.354Z",
    "dateReserved": "2026-08-26T14:34:25.791Z",
    "dateUpdated": "2026-10-19T08:43:18.848Z",
    "state": "PUBLISHED"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix accept list UAF during suspend\n\nhci_update_event_filter_sync() walks hdev-\u003eaccept_list while sending a\nsynchronous HCI command for each remote-wakeup device.  The suspend path\nholds hdev-\u003ereq_lock, but accept-list updates are serialized by hdev-\u003elock.\nConsequently, remove_device() can free the current list entry during the\ncontroller wait.\n\nThe following interleaving causes the use-after-free:\n\n  hci_update_event_filter_sync()    remove_device()\n  fetch accept-list entry\n  hci_set_event_filter_sync()\n    wait for controller response    hci_dev_lock()\n                                    list_del()\n                                    kfree()\n                                    hci_dev_unlock()\n  read the freed list.next\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in hci_suspend_sync+0x835/0x910\n  Read of size 8 at addr ffff88810bec8440 by task kworker/0:1/10\n  Workqueue: events vhci_suspend_work\n  Call Trace:\n   hci_suspend_sync+0x835/0x910\n   hci_suspend_dev+0x182/0x450\n   process_one_work+0x661/0x1090\n   worker_thread+0x45b/0xd10\n\n  Allocated by task 86:\n   hci_bdaddr_list_add_with_flags+0x1a8/0x400\n   add_device+0x381/0x820\n   hci_sock_sendmsg+0x1033/0x1ea0\n\n  Freed by task 91:\n   kfree+0x131/0x3c0\n   remove_device+0x429/0xb70\n   hci_sock_sendmsg+0x1033/0x1ea0\n\nSnapshot the remote-wakeup addresses under hdev-\u003elock.  Release the lock\nbefore sending HCI commands.  Clear the controller event filter before\nbuilding the snapshot, and skip allocation and the second list traversal\nwhen there are no matching entries.  This preserves the original filter\nand scan-state updates without retaining an accept-list node across a\ncontroller wait."
          }
        ],
        "id": "CVE-2026-80762",
        "lastModified": "2026-10-19T09:17:09.997",
        "metrics": {},
        "published": "2026-09-04T16:18:01.313",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-26T00:52:42+00:00",
      "cve": "CVE-2026-80762",
      "id": "CVE-2026-80762",
      "initial_release_date": "2026-09-04T00:00:00+00:00",
      "product_status:known_affected": "235",
      "product_status:known_not_affected": "43",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: hci_sync: Fix accept list UAF during suspend",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80762.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-20T01:24:53Z",
      "cve": "CVE-2026-80762",
      "id": "CVE-2026-80762",
      "initial_release_date": "2026-09-07T16:20:09Z",
      "product_status:known_affected": "84",
      "product_status:known_not_affected": "269",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80762",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-80762.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.