Vulnerability · Published Oct 16, 2026 · Assigned by AMZN

CVE-2026-109587Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel

High 8.8

In plain English

A high-severity incorrect authorization in FreeRTOS-Kernel from FreeRTOS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.1%top 96.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
FreeRTOS	FreeRTOS-Kernel	11.3.0 – through 11.3.1

Weakness: CWE-863 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.2 release-notes, patch
https://aws.amazon.com/security/security-bulletins/2026-138-aws/ vendor-advisory
https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-pv9j-rq42-3fjc third-party-advisory