CVE-2017-12899: Debian Linux

Critical severity, CVSS 9.8. EPSS: 3.3% chance of exploitation in the next 30 days.

The DECnet parser in tcpdump before 4.9.2 has a buffer over-read in print-decnet.c:decnet_print().

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.6 only; version 7.7 only
• Tcpdump Tcpdump: up to and including 4.9.1

Published 2017-09-14. Last modified 2026-06-17.