CVE-2026-109588 — Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel
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…
Published: 2026-10-16 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7