In Wireshark 2.4.0 to 2.4.5 and 2.2.0 to 2.2.13, the NBAP dissector could crash with a large loop that ends with a heap-based buffer overflow. This was addressed in epan/dissectors/packet-nbap.c by prohibiting the self-linking of DCH-IDs.
https://www.wireshark.org/security/wnpa-sec-2018-18.html
https://www.debian.org/security/2018/dsa-4217
https://lists.debian.org/debian-lts-announce/2018/05/msg00019.html