Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_uart: fix null-ptr-deref in hci_uart_write_work hci_uart_set_proto() sets HCI_UART_PROTO_INIT before calling hci_uart_register_dev(), which calls proto->open() to initialize hu->priv. However, if a TTY write wakeup occurs during this window, hci_uart_tx_wakeup() may schedule write_work before hu->priv is initialized, leading to a NULL pointer dereference in hci_uart_write_work() when proto->dequeue() accesses hu->priv. The race condition is: CPU0 CPU1 ---- ---- hci_uart_set_proto() set_bit(HCI_UART_PROTO_INIT) hci_uart_register_dev() tty write wakeup hci_uart_tty_wakeup() hci_uart_tx_wakeup() schedule_work(&hu->write_work) proto->open(hu) // initializes hu->priv hci_uart_write_work() hci_uart_dequeue() proto->dequeue(hu) // accesses hu->priv (NULL!) Fix this by moving set_bit(HCI_UART_PROTO_INIT) after proto->open() succeeds, ensuring hu->priv is initialized before any work can be scheduled.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a40f94f7caa8d3421b64f63ac31bc0f24c890f39 before b0a900939e7e4866d9b90e9112514b72c451e873; affected 9e5a0f5777162e503400c70c6ed25fbbe2d38799 before ccc683f597ceb28deb966427ae948e5ac739a909; affected 80f14e9de6a43a0bd8194cad1003a3e6dcbc3984 before 937a573423ce5a96fdb1fd425dc6b8d8d4ab5779; affected 02e1bcdfdf769974e7e9fa285e295cd9852e2a38 before 186d147cf7689ba1f9b3ddb753ab634a84940cc9; affected 281782d2c6730241e300d630bb9f200d831ede71 before 53e54cb31e667fca05b1808b990eac0807d1dab0; affected 5df5dafc171b90d0b8d51547a82657cd5a1986c7 before 03e8c90c62233382042b7bd0fa8b8900552fdb62; affected 5df5dafc171b90d0b8d51547a82657cd5a1986c7 before 0c3cd7a0b862c37acbee6d9502107146cc944398; affected 1dcf08fcff5ca529de6dc0395091f28854f4e54a; affected 8e5aff600539e5faea294d9612cca50220e602b8; affected db7509fa110dd9b11134b75894677f30353b2c51; affected 5.10.237 before 5.10.249; affected 5.15.181 before 5.15.199; affected 6.1.135 before 6.1.162; affected 6.6.88 before 6.6.123; affected 6.12.24 before 6.12.69; affected 5.4.293 before 5.5; affected 6.13.12 before 6.14; affected 6.14.3 before 6.15 |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 5.10.249 through 5.10.*; unaffected 5.15.199 through 5.15.*; unaffected 6.1.162 through 6.1.*; unaffected 6.6.123 through 6.6.*; unaffected 6.12.69 through 6.12.*; unaffected 6.18.9 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b0a900939e7e4866d9b90e9112514b72c451e873
- https://git.kernel.org/stable/c/ccc683f597ceb28deb966427ae948e5ac739a909
- https://git.kernel.org/stable/c/937a573423ce5a96fdb1fd425dc6b8d8d4ab5779
- https://git.kernel.org/stable/c/186d147cf7689ba1f9b3ddb753ab634a84940cc9
- https://git.kernel.org/stable/c/53e54cb31e667fca05b1808b990eac0807d1dab0
- https://git.kernel.org/stable/c/03e8c90c62233382042b7bd0fa8b8900552fdb62
- https://git.kernel.org/stable/c/0c3cd7a0b862c37acbee6d9502107146cc944398
ADP enrichment
No English description supplied.
No references supplied.