In Wireshark 3.0.0, the GSUP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-gsm_gsup.c by rejecting an invalid Information Element length.
lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
www.securityfocus.com/bid/107836
bugs.wireshark.org/bugzilla/show_bug.cgi?id=15585
code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=f80b7d1b279fb6c13f640019a1bbc42b18bf7469
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4LYIOOQIMFQ3PA7AFBK4DNXHISTEYUC5/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PU3QA2DUO3XS24QE24CQRP4A4XQQY76R/
www.wireshark.org/security/wnpa-sec-2019-12.html