CVE-2026-68339 Bluetooth: btusb: validate Realtek vendor event length

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: validate Realtek vendor event length btusbrecveventrealtek reads the event code at data0 and the Realtek subevent code at data2 before deciding whether to consume a vendor event as a coredump. For example, the...

CVE-2026-68339

The Linux kernel Bluetooth btusb vulnerability CVE-2026-68339 stems from btusb_recv_event_realtek() inspecting data[0] and data[2] before verifying the HCI event header and first parameter. This can cause misclassification of a vendor event as a coredump (e.g., a 2-byte event ff 00 with adjacent ...