FreeRADIUS is an open source RADIUS authentication server implementation.
There are undisclosed defects in the way FreeRADIUS handles incorrect received packets.
A remote attacker could send specially-crafted packets to the FreeRADIUS server to deny service to other users by crashing the server.
There is no known workaround at this time.
All FreeRADIUS users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=net-dialup/freeradius-1.0.1"
# emerge ">=net-dialup/freeradius-1.0.1"