The LLDP parser in tcpdump before 4.9.2 has a buffer over-read in print-lldp.c:lldp_mgmt_addr_tlv_print().
https://support.apple.com/HT208221
https://security.gentoo.org/glsa/201709-23
https://github.com/the-tcpdump-group/tcpdump/commit/a77ff09c46560bc895dea11dc9fe643486b056ac
https://access.redhat.com/errata/RHEA-2018:0705
http://www.tcpdump.org/tcpdump-changes.txt