GHSA-R93R-QRFP-H69J

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-14 00:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds

Dereferencing RCU-protected pointers outside critical sections is invalid and may lead to UAF. Use of hci_conn in hci_sync callbacks also needs to hold refcount to avoid UAF.

Take appropriate locks for hci_conn lookups, and take refcount for hci_conn pointers stored in mgmt_pending_cmd so that the pointer stays valid.

When accessing conn->state, ensure hdev->lock is held to avoid data race.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-68391"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:32Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds\n\nDereferencing RCU-protected pointers outside critical sections is\ninvalid and may lead to UAF.  Use of hci_conn in hci_sync callbacks also\nneeds to hold refcount to avoid UAF.\n\nTake appropriate locks for hci_conn lookups, and take refcount for\nhci_conn pointers stored in mgmt_pending_cmd so that the pointer stays\nvalid.\n\nWhen accessing conn-\u003estate, ensure hdev-\u003elock is held to avoid data\nrace.",
  "id": "GHSA-r93r-qrfp-h69j",
  "modified": "2026-08-14T00:31:57Z",
  "published": "2026-08-10T15:33:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68391"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b56f2ecafc08f372bf0529f9c4f3f429cb1702dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5b3b484b62bb0f4542e7622789d28871626cdf0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da55f570191d5d72f10c607a7043b947eb05ea46"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ecdcb55ea1c01dda074406f38058785a69526734"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f915e74b6f18293d1d69a2a3305ef321ff7c0172"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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