CVE-2020-13984: Contiki-OS Contiki

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

An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when processing IPv6 extension headers in ext_hdr_options_process in net/ipv6/uip6.c.

Affected products

• Contiki-OS Contiki: up to and including 3.0

Published 2020-12-11. Last modified 2026-06-17.