Vulnerability-Lookup

FKIE_CVE-2026-80762

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-04 16:18

Severity

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.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/29c59212a507804d7616b8abf491d30b4ab8e75f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/87ad116ac3abc6f2ce2b5b6c488f633003581eee
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/95bb57bc11a91caf042ad00fca85e480d3fda37f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b5181516a9f5c2fdb3271cdad72a5b16c6963a44
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bb5f5414d1a6272a16f68684e998f4063dd19f57
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f57b399c4fa1501b2d5451f52d861ece86bcf3db
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fe93a697a7a92fa9adf78c9ff67a10db3193290c

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bb5f5414d1a6272a16f68684e998f4063dd19f57",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "b5181516a9f5c2fdb3271cdad72a5b16c6963a44",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "87ad116ac3abc6f2ce2b5b6c488f633003581eee",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "fe93a697a7a92fa9adf78c9ff67a10db3193290c",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "95bb57bc11a91caf042ad00fca85e480d3fda37f",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "29c59212a507804d7616b8abf491d30b4ab8e75f",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "f57b399c4fa1501b2d5451f52d861ece86bcf3db",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "lessThan": "5.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.187",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.156",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.108",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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": "2026-09-04T16:18:01.313",
  "metrics": {},
  "published": "2026-09-04T16:18:01.313",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29c59212a507804d7616b8abf491d30b4ab8e75f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/87ad116ac3abc6f2ce2b5b6c488f633003581eee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95bb57bc11a91caf042ad00fca85e480d3fda37f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b5181516a9f5c2fdb3271cdad72a5b16c6963a44"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bb5f5414d1a6272a16f68684e998f4063dd19f57"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f57b399c4fa1501b2d5451f52d861ece86bcf3db"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe93a697a7a92fa9adf78c9ff67a10db3193290c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

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

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-04 15:12

Title

Bluetooth: hci_sync: Fix accept list UAF during suspend

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/bb5f5414d1a6272a1…
https://git.kernel.org/stable/c/b5181516a9f5c2fdb…
https://git.kernel.org/stable/c/87ad116ac3abc6f2c…
https://git.kernel.org/stable/c/fe93a697a7a92fa9a…
https://git.kernel.org/stable/c/95bb57bc11a91caf0…
https://git.kernel.org/stable/c/29c59212a507804d7…
https://git.kernel.org/stable/c/f57b399c4fa1501b2…

Impacted products

2 products

Vendor	Product	Version
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)
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-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bb5f5414d1a6272a16f68684e998f4063dd19f57",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "b5181516a9f5c2fdb3271cdad72a5b16c6963a44",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "87ad116ac3abc6f2ce2b5b6c488f633003581eee",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "fe93a697a7a92fa9adf78c9ff67a10db3193290c",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "95bb57bc11a91caf042ad00fca85e480d3fda37f",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "29c59212a507804d7616b8abf491d30b4ab8e75f",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            },
            {
              "lessThan": "f57b399c4fa1501b2d5451f52d861ece86bcf3db",
              "status": "affected",
              "version": "182ee45da083db4e3e621541ccf255bfa9652214",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "lessThan": "5.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.187",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.156",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.108",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.187",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.156",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.108",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.47",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.11",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.1",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:12:34.354Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bb5f5414d1a6272a16f68684e998f4063dd19f57"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5181516a9f5c2fdb3271cdad72a5b16c6963a44"
        },
        {
          "url": "https://git.kernel.org/stable/c/87ad116ac3abc6f2ce2b5b6c488f633003581eee"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe93a697a7a92fa9adf78c9ff67a10db3193290c"
        },
        {
          "url": "https://git.kernel.org/stable/c/95bb57bc11a91caf042ad00fca85e480d3fda37f"
        },
        {
          "url": "https://git.kernel.org/stable/c/29c59212a507804d7616b8abf491d30b4ab8e75f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f57b399c4fa1501b2d5451f52d861ece86bcf3db"
        }
      ],
      "title": "Bluetooth: hci_sync: Fix accept list UAF during suspend",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80762",
    "datePublished": "2026-09-04T15:12:34.354Z",
    "dateReserved": "2026-08-26T14:34:25.791Z",
    "dateUpdated": "2026-09-04T15:12:34.354Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.