tcpdump is vulnerable to denial of service (DoS). The vulnerability exists as tcpdump before 4.9.3 has a heap-based buffer over-read related to aoe_print in print-aoe.c and lookup_emem in addrtoname.c.
lists.opensuse.org/opensuse-security-announce/2019-08/msg00065.html
packetstormsecurity.com/files/154710/Slackware-Security-Advisory-tcpdump-Updates.html
www.securitytracker.com/id/1039773
github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES
github.com/the-tcpdump-group/tcpdump/issues/645
seclists.org/bugtraq/2019/Oct/2