{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-23146",
  "modified": "2026-10-07T14:35:31Z",
  "upstream": [
    "CVE-2026-23146"
  ],
  "published": "2026-02-14T16:05:08Z",
  "summary": "Bluetooth: hci_uart: fix null-ptr-deref in hci_uart_write_work",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_uart: fix null-ptr-deref in hci_uart_write_work\n\nhci_uart_set_proto() sets HCI_UART_PROTO_INIT before calling\nhci_uart_register_dev(), which calls proto->open() to initialize\nhu->priv. However, if a TTY write wakeup occurs during this window,\nhci_uart_tx_wakeup() may schedule write_work before hu->priv is\ninitialized, leading to a NULL pointer dereference in\nhci_uart_write_work() when proto->dequeue() accesses hu->priv.\n\nThe race condition is:\n\n  CPU0                              CPU1\n  ----                              ----\n  hci_uart_set_proto()\n    set_bit(HCI_UART_PROTO_INIT)\n    hci_uart_register_dev()\n                                    tty write wakeup\n                                      hci_uart_tty_wakeup()\n                                        hci_uart_tx_wakeup()\n                                          schedule_work(&hu->write_work)\n      proto->open(hu)\n        // initializes hu->priv\n                                    hci_uart_write_work()\n                                      hci_uart_dequeue()\n                                        proto->dequeue(hu)\n                                          // accesses hu->priv (NULL!)\n\nFix this by moving set_bit(HCI_UART_PROTO_INIT) after proto->open()\nsucceeds, ensuring hu->priv is initialized before any work can be\nscheduled.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23146"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b0a900939e7e4866d9b90e9112514b72c451e873"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ccc683f597ceb28deb966427ae948e5ac739a909"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/937a573423ce5a96fdb1fd425dc6b8d8d4ab5779"
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      "url": "https://git.kernel.org/stable/c/186d147cf7689ba1f9b3ddb753ab634a84940cc9"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/53e54cb31e667fca05b1808b990eac0807d1dab0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/03e8c90c62233382042b7bd0fa8b8900552fdb62"
    },
    {
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      "url": "https://git.kernel.org/stable/c/0c3cd7a0b862c37acbee6d9502107146cc944398"
    }
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    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
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}