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.
lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
www.securityfocus.com/bid/106482
bugs.wireshark.org/bugzilla/show_bug.cgi?id=15217
code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=2b2eea1793dbff813896e1ae9dff1bedb39ee010
lists.debian.org/debian-lts-announce/2019/01/msg00022.html
seclists.org/bugtraq/2019/Mar/35
www.debian.org/security/2019/dsa-4416
www.wireshark.org/security/wnpa-sec-2019-01.html