The White Board protocol parser in tcpdump before 4.9.2 has a buffer over-read in print-wb.c:wb_prep(), several functions.
https://support.apple.com/HT208221
https://security.gentoo.org/glsa/201709-23
https://github.com/the-tcpdump-group/tcpdump/commit/cc356512f512e7fa423b3674db4bb31dbe40ffec
https://access.redhat.com/errata/RHEA-2018:0705
http://www.tcpdump.org/tcpdump-changes.txt