CVE-2018-7421: Wireshark

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Affected products

• Wireshark Wireshark: from 2.2.0, up to and including 2.2.12; from 2.4.0, up to and including 2.4.4

Published 2018-02-23. Last modified 2026-06-17.