It was reported that Wireshark's WebSocket dissector could recurse excessively. It may be possible to make Wireshark consume excessive CPU resources by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.
This flaw is fixed in versions the following Wireshark versions: 1.12.5.
Fixed in Fedora via:
FEDORA-2015-8150 -- wireshark-1.12.5-1.fc21
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2015:2393 https://rhn.redhat.com/errata/RHSA-2015-2393.html