In Wireshark 2.6.0 to 2.6.3, the Steam IHS Discovery dissector could consume system memory. This was addressed in epan/dissectors/packet-steam-ihs-discovery.c by changing the memory-management approach.
lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
www.securityfocus.com/bid/105583
www.securitytracker.com/id/1041909
bugs.wireshark.org/bugzilla/show_bug.cgi?id=15171
code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=6e920ddc3cad2886ef07ca1a8e50e2a5c50986f7
www.debian.org/security/2018/dsa-4359
www.wireshark.org/security/wnpa-sec-2018-48.html