CVE-2026-77235: Amazon Freertos

High severity, CVSS 7.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issue, users should upgrade to version 11.3.1 or later.

Affected products

• Amazon Freertos: from 10.2.0, before 11.3.1 (fixed in 11.3.1)

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