In Wireshark 2.6.0 to 2.6.5, the 6LoWPAN dissector could crash. This was addressed in epan/dissectors/packet-6lowpan.c by avoiding use of a TVB before its creation.
https://www.wireshark.org/security/wnpa-sec-2019-01.html
https://www.debian.org/security/2019/dsa-4416
https://seclists.org/bugtraq/2019/Mar/35
https://lists.debian.org/debian-lts-announce/2019/01/msg00022.html
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15217
http://www.securityfocus.com/bid/106482
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html