The Zephyr parser in tcpdump before 4.9.2 has a buffer over-read in print-zephyr.c, several functions.
www.debian.org/security/2017/dsa-3971
www.securitytracker.com/id/1039307
www.tcpdump.org/tcpdump-changes.txt
access.redhat.com/errata/RHEA-2018:0705
github.com/the-tcpdump-group/tcpdump/commit/6ec0c6fa63412c7a07a5bcb790a529c3563b4173
github.com/the-tcpdump-group/tcpdump/commit/d17507ffa3e9742199b02a66aa940e79ababfa30
security.gentoo.org/glsa/201709-23
support.apple.com/HT208221