CVE-2016-7993: Tcpdump

Critical severity, CVSS 9.8. EPSS: 3.4% chance of exploitation in the next 30 days.

A bug in util-print.c:relts_print() in tcpdump before 4.9.0 could cause a buffer overflow in multiple protocol parsers (DNS, DVMRP, HSRP, IGMP, lightweight resolver protocol, PIM).

Affected products

• Tcpdump Tcpdump: up to and including 4.8.1

Published 2017-01-28. Last modified 2026-06-17.