GHSA-RF7J-4MGX-52C3

Vulnerability from github – Published: 2026-06-24 09:30 – Updated: 2026-06-28 09:31
VLAI
Details

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

Bluetooth: serialize accept_q access

bt_sock_poll() walks the accept queue without synchronization, while child teardown can unlink the same socket and drop its last reference. The unsynchronized accept queue walk has existed since the initial Bluetooth import.

Protect accept_q with a dedicated lock for queue updates and polling. Also rework bt_accept_dequeue() to take temporary child references under the queue lock before dropping it and locking the child socket.

Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-52918"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T08:16:21Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: serialize accept_q access\n\nbt_sock_poll() walks the accept queue without synchronization, while\nchild teardown can unlink the same socket and drop its last reference.\nThe unsynchronized accept queue walk has existed since the initial\nBluetooth import.\n\nProtect accept_q with a dedicated lock for queue updates and polling.\nAlso rework bt_accept_dequeue() to take temporary child references under\nthe queue lock before dropping it and locking the child socket.",
  "id": "GHSA-rf7j-4mgx-52c3",
  "modified": "2026-06-28T09:31:36Z",
  "published": "2026-06-24T09:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52918"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41c8c1c7923e86e0eb59cfb4279349112756a336"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ec17782fd186f901a7329605d11048b085b945a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/85f8674cae82053f1e6bab295f6a8422cca14db5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b4c412e001b0c670eb937beab491af974da55b3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a218bf69eb51fefe59a3976fa8925261141f681c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be43e6b4043113c3b3cf887c3c8350f67140274c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9ce4de05df2385c19e2c7d12f529144e1a44af1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e83f5e24da741fa9405aeeff00b08c5ee7c37b88"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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