{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80692",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-80692"
  ],
  "published": "2026-08-28T06:53:24Z",
  "summary": "Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks\n\nThere is theoretical UAF if the conn is freed while the hci_sync task\nis running.\n\nHold refcount to avoid that.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80692"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9a77f296aff4b2ca5f2928ab3a3220c82d8b4074"
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    "upstream_modified": "2026-08-29T06:25:05Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - Bluetooth HCI outgoing ACL/LE connection setup (hci_connect_acl_sync/hci_connect_le_sync) is driven by adjacent radio peers supplying HCI events (connection complete/failures, command status) while hci_cmd_sync_work blocks on controller replies on phones and laptops.\nAC:L - Race between hci_cmd_sync_work using a bare hci_conn pointer and hci_conn_del/hci_conn_failed/create_le_conn_complete teardown; attacker controls both sides by concurrently initiating L2CAP/MGMT connects and aborting or inducing remote HCI failure events until the window hits.\nPR:N - Adjacent Bluetooth peers need no Linux credentials; freeing runs on unauthenticated HCI connection events, and local triggering works via unprivileged AF_BLUETOOTH L2CAP connect() without CAP_NET_ADMIN or special namespaces.\nUI:N - Background Bluetooth auto-reconnect, pairing flows, or listening socket-driven outgoing connects create BT_OPEN hci_conn objects without deliberate user action; attacker timing of connect/teardown does not require social engineering.\nS:U - Kernel heap UAF within the Bluetooth stack enables local privilege escalation in the same kernel domain but does not cross VM, IOMMU, or sandbox boundaries.\nC:H - Freed struct hci_conn is dereferenced in hci_acl_create_conn_sync, hci_le_create_conn_sync, and create_le_conn_complete (e.g., conn->pkt_type, conn->dst, conn->le_conn_timeout), enabling slab reuse and arbitrary kernel memory disclosure.\nI:H - Post-free writes occur to conn fields (state, flags, timers) and function-pointer members (cleanup, connect_cfm_cb), providing groomable heap corruption suitable for arbitrary kernel write and code execution.\nA:H - UAF during hci_cmd_sync_work on connection setup reliably causes kernel oops/panic and can be retriggered by repeated connect/abort cycles from adjacent or local attackers."
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}