GHSA-H5CP-PGFW-22WH

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-25 09:31
VLAI
Details

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

Bluetooth: ISO: Fix a use-after-free of the hci_conn pointer

In iso_sock_rebind_bc(), the bis pointer is cached, then the socket lock is dropped: bis = iso_pi(sk)->conn->hcon; / Release the socket before lookups since that requires hci_dev_lock * which shall not be acquired while holding sock_lock for proper * ordering. / release_sock(sk); hci_dev_lock(bis->hdev);

During the unlocked window, could a concurrent close() destroy the connection and free the bis structure, causing hci_dev_lock(bis->hdev) to access memory after it is freed, fix this by using the hdev reference which was safely acquired via iso_conn_get_hdev().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53276"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:45Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix a use-after-free of the hci_conn pointer\n\nIn iso_sock_rebind_bc(), the bis pointer is cached, then the socket lock is\ndropped:\n\tbis = iso_pi(sk)-\u003econn-\u003ehcon;\n\t/* Release the socket before lookups since that requires hci_dev_lock\n\t * which shall not be acquired while holding sock_lock for proper\n\t * ordering.\n\t */\n\trelease_sock(sk);\n\thci_dev_lock(bis-\u003ehdev);\n\nDuring the unlocked window, could a concurrent close() destroy the connection\nand free the bis structure, causing hci_dev_lock(bis-\u003ehdev) to access memory\nafter it is freed, fix this by using the hdev reference which was safely\nacquired via iso_conn_get_hdev().",
  "id": "GHSA-h5cp-pgfw-22wh",
  "modified": "2026-06-25T09:31:23Z",
  "published": "2026-06-25T09:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53276"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d324b8aa20bd3c3394e3647dc22491d88f3f4e7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f50331f2a1441ec49988832c3a95f2edacc47322"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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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.

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