CVE-2026-109588

CVE-2026-109588 · Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Numeric truncation of the buffer length in the MPU buffer authorization check in FreeRTOS-Kernel V11.3.0 and V11.3.1 on the Arm Cortex-R82 (Armv8-R AArch64) MPU port might allow, under certain conditions, an unprivileged task on MPU-enabled builds to read or write privileged kernel memory beyond the validated buffer window, via a stream buffer system call. To remediate this issue, users should upgrade to version V11.3.2 or later.

CVSS 9.3 · Critical · EPSS 0.1%

Published

2026-10-16T17:09:51.788Z

Updated

2026-10-20T18:08:02.113Z

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