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

Quick assessment

Affected
FreeRTOS FreeRTOS-Kernel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 FreeRTOS-Kernel V11.3.0 和 V11.3.1 中，Arm Cortex-R82（Armv8-R AArch64）的 MPU 端口存在授权验证不当的漏洞。在启用了 MPU 的构建版本中，非特权任务可能通过向 MPU 系统调用传递缓冲区参数，读取和写入未分配给该任务的特权内核内存区域。 为修复此问题，用户应升级至 V11.3.2 或更高版本。

CVSS 8.8 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
FreeRTOS FreeRTOS-Kernel 11.3.0≤ 11.3.1 affected
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I. Basic Information for CVE-2026-109587

Vulnerability Information
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Vulnerability Title
Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRTOS FreeRTOS-Kernel 11.3.0 ~ 11.3.1 -

II. Public POCs for CVE-2026-109587

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-109587

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Vendor Advisories for CVE-2026-109587 (2)

Vendor Pages for CVE-2026-109587 (1)

Same Patch Batch · FreeRTOS · 2026-10-16 · 4 CVEs total

CVE-2026-109588 8.8 HIGH Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel
CVE-2026-102551 7.7 HIGH Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router
CVE-2026-102552 5.9 MEDIUM Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP DNS re

IV. Related Vulnerabilities

Same product: FreeRTOS-Kernel
Same vendor: FreeRTOS
Same weakness: CWE-863

V. Comments for CVE-2026-109587

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