The IEEE 802.11 parser in tcpdump before 4.9.2 has a buffer over-read in print-802_11.c:parse_elements().
https://support.apple.com/HT208221
https://security.gentoo.org/glsa/201709-23
https://github.com/the-tcpdump-group/tcpdump/commit/99798bd9a41bd3d03fdc1e949810a38967f20ed3
https://github.com/the-tcpdump-group/tcpdump/commit/2ecb9d2c67d9119250c54811a6ce4d0f2ddf44f1
https://access.redhat.com/errata/RHEA-2018:0705
http://www.tcpdump.org/tcpdump-changes.txt