{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53252",
  "modified": "2026-10-07T14:35:31Z",
  "upstream": [
    "CVE-2026-53252"
  ],
  "published": "2026-06-25T08:41:40Z",
  "summary": "Bluetooth: fix memory leak in error path of hci_alloc_dev()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix memory leak in error path of hci_alloc_dev()\n\nEarly failures in Bluetooth HCI UART configuration leak SRCU percpu\nmemory.\n\nWhen device initialization fails before hci_register_dev() completes,\nthe HCI_UNREGISTER flag is never set. As a result, when the device\nreference count reaches zero, bt_host_release() evaluates this flag as\nfalse and falls back to a direct kfree(hdev).\n\nBecause hci_release_dev() is bypassed, the SRCU struct initialized\nearly in hci_alloc_dev() is never cleaned up, resulting in a leak of\npercpu memory.\n\nFix the leak by explicitly calling cleanup_srcu_struct() in the\nfallback (unregistered) branch of bt_host_release() before freeing\nthe device.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53252"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c016118b9e51eeaf5bc93850d4c455a3b583c0aa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0622e527a31d4b44737fed5c1a2ac1fc2cfb5184"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bc2efe73c194a74839d7cf57b63880d97e21d309"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ce4b4cac3c5749b6aa75e62e2991ae2263f2f889"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f82799407a50af7bcacacf09cc9b279af8fe9b81"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-25T08:41:40Z"
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}