In Wireshark 2.2.0 to 2.2.1 and 2.0.0 to 2.0.7, the DTN dissector could go into an infinite loop, triggered by network traffic or a capture file. This was addressed in epan/dissectors/packet-dtn.c by checking whether SDNV evaluation was successful.
https://www.wireshark.org/security/wnpa-sec-2016-62.html
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13097
http://www.securitytracker.com/id/1037313