CVE-2026-53073

A flaw was found in the Linux kernel's Bluetooth Host Controller Interface (HCI) Universal Asynchronous Receiver/Transmitter (UART) driver. When the hci_register_dev() function fails, a flag indicating protocol initialization is not properly cleared. This oversight allows incoming UART data to be processed by the protocol-specific receive handler after its associated resources have been released, potentially leading to a null pointer dereference. This vulnerability could result in a system crash, causing a Denial of Service (DoS).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.