In Wireshark 2.6.0, 2.4.0 to 2.4.6, and 2.2.0 to 2.2.14, the DNS dissector could crash. This was addressed in epan/dissectors/packet-dns.c by avoiding a NULL pointer dereference for an empty name in an SRV record.
lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
www.securityfocus.com/bid/104308
www.securitytracker.com/id/1041036
bugs.wireshark.org/bugzilla/show_bug.cgi?id=14681
code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=4425716ddba99374749bd033d9bc0f4add2fb973
lists.debian.org/debian-lts-announce/2019/01/msg00010.html
www.wireshark.org/security/wnpa-sec-2018-29.html