In tcpdump before 4.9.0, a bug in multiple protocol parsers (Geneve, GRE, NSH, OTV, VXLAN and VXLAN GPE) could cause a buffer overflow in print-ether.c:ether_print().
https://access.redhat.com/errata/RHSA-2017:1871
https://security.gentoo.org/glsa/201702-30