CVE-2021-27698: Riot-OS Riot

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

RIOT-OS 2021.01 contains a buffer overflow vulnerability in /sys/net/gnrc/routing/rpl/gnrc_rpl_control_messages.c through the _parse_options() function.

Affected products

• Riot-OS Riot: version 2021.01 only

Published 2021-04-06. Last modified 2026-06-17.