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

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.2 release-notespatch
• https://aws.amazon.com/security/security-bulletins/2026-138-aws/ vendor-advisory
• https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-qf4j-6f5j-876g third-party-advisory