In Wireshark 2.2.0 to 2.2.1, the Profinet I/O dissector could loop excessively, triggered by network traffic or a capture file. This was addressed in plugins/profinet/packet-pn-rtc-one.c by rejecting input with too many I/O objects.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 58.8%