security.c in hcid for BlueZ 2.16, 2.17, and 2.18 allows remote attackers to execute arbitrary commands via shell metacharacters in the Bluetooth device name when invoking the PIN helper.
hidd in BlueZ (bluez-utils) before 2.25 allows remote attackers to obtain control of the (1) Mouse and (2) Keyboard Human Interface Device (HID) via a certain configuration of two HID (PSM) endpoints, operating as a server, aka HidAttack.