CVE-2016-7933: The PPP parser in tcpdump before 4.9.0 has a buffer overflow in print-ppp.c:ppp_hdlc_if_print().

Security readout for executives and security teams

Older tcpdump versions can overflow memory while parsing PPP traffic. This matters for systems and analysts that inspect live traffic or packet captures with tcpdump before 4.9.0. The provided sources do not show active exploitation, but a vulnerable packet parser can still create operational risk on monitoring and investigation systems. Exposure is most likely where tcpdump before 4.9.0 is installed and used to inspect PPP traffic or untrusted packet captures. This may include Linux servers, analyst workstations, and monitoring systems. Distribution package versions may include backported fixes, so validate against vendor advisories rather than version strings alone. Treat as a targeted hygiene issue for monitoring and incident-response environments. Prioritize patching systems that parse untrusted captures or live network traffic. Business urgency is moderate because sources do not show active exploitation, but vulnerable diagnostic tooling can become an entry point or cause disruption. Mitigation focus: Upgrade tcpdump to 4.9.0 or a vendor-fixed package where available.; Apply relevant Debian, Red Hat, or Gentoo security updates if using those distributions.; Avoid opening untrusted packet captures with vulnerable tcpdump..

Prepared

Jun 13, 2026, 09:16 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.