In Wireshark 2.4.0 to 2.4.4 and 2.2.0 to 2.2.12, epan/dissectors/packet-dcm.c had an infinite loop that was addressed by checking for integer wraparound.
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14411
https://lists.debian.org/debian-lts-announce/2018/04/msg00018.html
https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html