It was reported that Wireshark's IEEE 802.11 dissector could enter an infinite loop. It may be possible to make Wireshark crash 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, 1.10.14.
Fixed in Fedora via:
FEDORA-2015-8174 -- wireshark-1.10.14-1.fc20
FEDORA-2015-8150 -- wireshark-1.12.5-1.fc21
This issue did not affect the versions of wireshark as shipped with Red Hat Enterprise Linux 5, 6 and 7.