CVE-2026-53073

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu) and setting hu->hdev to NULL. This means incoming UART data will reach the protocol-specific recv handler in hci_uart_tty_receive() after resources are freed. Clear HCI_UART_PROTO_INIT with a write lock before calling hu->proto->close() and setting hu->hdev to NULL. The write lock ensures all active readers have completed and no new reader can enter the protocol recv path before resources are freed. This allows the protocol-specific recv functions to remove the "HCI_UART_REGISTERED" guard without risking a null pointer dereference if hci_register_dev() fails.

• linux linux kernel (>= 5.4.293 < 5.5) • linux linux kernel (>= 5.10.237 < 5.10.258) • linux linux kernel (>= 5.15.181 < 5.15.209) • linux linux kernel (>= 6.1.135 < 6.1.175) • linux linux kernel (>= 6.6.88 < 6.6.141) • linux linux kernel (>= 6.12.24 < 6.12.91) • linux linux kernel (>= 6.13.12 < 6.14) • linux linux kernel (>= 6.14.3 < 6.18.33) • linux linux kernel (>= 6.19 < 7.0.10)