High 8.8Published Oct 16, 2026

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

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects FreeRTOS-Kernel. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: AMZN
NVD analysis: Awaiting Analysis
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 16, 2026

Affected products

Affected products

FreeRTOS FreeRTOS-Kernel freertos:kernel (from the name)	from 11.3.0 through 11.3.1	CNA record

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.