CVE-2021-27697: Riot-OS Riot

Critical severity, CVSS 9.8. EPSS: 1.3% 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_validation.c through the gnrc_rpl_validation_options() function.

Affected products

• Riot-OS Riot: version 2021.01 only

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