CVE-2026-109587
Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel
- State
- Published
- Severity
- 9.3 Critical
- Published
- Oct 16, 2026
- Updated
- Oct 20, 2026
- Reserved
- Oct 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | AMZN |
| 3.1 | 8.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | AMZN |
Weaknesses
- CWE-863 Incorrect authorization
Affected Products
| Product | Versions |
|---|---|
FreeRTOS-KernelFreeRTOS |
|
References
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.2release-notespatch
- https://aws.amazon.com/security/security-bulletins/2026-138-aws/vendor-advisory
- https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-pv9j-rq42-3fjcthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.