bluez-utils are the utilities for use with the BlueZ implementation of the Bluetooth wireless standards for Linux.
The name of a Bluetooth device is improperly validated by the hcid utility when a remote device attempts to pair itself with a computer.
An attacker could create a malicious device name on a Bluetooth device resulting in arbitrary commands being executed as root upon attempting to pair the device with the computer.
There are no known workarounds at this time.
All bluez-utils users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-wireless/bluez-utils-2.19"