CVE-2026-109587: Freertos Freertos-Kernel

High severity, CVSS 8.8. EPSS: 0.1% chance of exploitation in the next 30 days.

Incorrect authorization in the Arm Cortex-R82 (Armv8-R AArch64) MPU port in FreeRTOS-Kernel V11.3.0 and V11.3.1 might allow an unprivileged task on MPU-enabled builds to read and write privileged kernel memory outside the regions assigned to it, via a buffer argument passed to an MPU system call. To remediate this issue, users should upgrade to version V11.3.2 or later.

Affected products

• Freertos Freertos-Kernel: from 11.3.0, up to and including 11.3.1

Published 2026-10-16. Last modified 2026-10-16.