In Wireshark 2.2.0 to 2.2.4 and 2.0.0 to 2.0.10, there is an IAX2 infinite loop, triggered by packet injection or a malformed capture file. This was addressed in epan/dissectors/packet-iax2.c by constraining packet lateness.
https://www.wireshark.org/security/wnpa-sec-2017-10.html
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13432