CVE-2026-77234: Amazon Freertos

High severity, CVSS 8.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.

Affected products

• Amazon Freertos: from 7.0.0, before 11.3.1 (fixed in 11.3.1)

Published 2026-08-21. Last modified 2026-08-27.