In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the SIGCOMP dissector could crash. This was addressed in epan/dissectors/packet-sigcomp.c by correcting the extraction of the length value.
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14410
https://lists.debian.org/debian-lts-announce/2018/04/msg00018.html
https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html