An FR-GV-203 issue in FreeRADIUS 2.x before 2.2.10 allows "DHCP - Memory leak in decode_tlv()" and a denial of service.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-2618
https://access.redhat.com/errata/RHSA-2017:1759
http://www.securitytracker.com/id/1038914
http://www.securityfocus.com/bid/99905