In Wireshark 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11, the PacketBB dissector could crash, triggered by packet injection or a malformed capture file. This was addressed in epan/dissectors/packet-packetbb.c by restricting additions to the protocol tree.
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13559
https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html