CVE-2026-109587
High
Description
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductFreeRTOS-Kernel
PublishedOct 16, 2026
First seenOct 16, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| FreeRTOS FreeRTOS-Kernel | 11.3.0 ≤ v ≤ 11.3.1 | — |
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