In Wireshark 2.2.0 to 2.2.7 and 2.0.0 to 2.0.13, the DOCSIS dissector could go into an infinite loop. This was addressed in plugins/docsis/packet-docsis.c by rejecting invalid Frame Control parameter values.
www.securityfocus.com/bid/99903
www.securitytracker.com/id/1038966
bugs.wireshark.org/bugzilla/show_bug.cgi?id=13797
code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=250216263c3a3f2c651e80d9c6b3dc0adc53dc2c
lists.debian.org/debian-lts-announce/2019/01/msg00010.html
www.wireshark.org/security/wnpa-sec-2017-36.html