Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-109588— Numeric truncation in the MPU buffer authorization check 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 Arm Cortex-R82（Armv8-R AArch64）MPU 移植版本中，FreeRTOS-Kernel V11.3.0 和 V11.3.1 的 MPU 缓冲区授权检查存在缓冲区长度数值截断漏洞。在特定条件下，该漏洞可能使非特权任务在启用 MPU 的构建版本中，通过流缓冲区（stream buffer）系统调用，读取或写入经校验的缓冲区窗口之外的特权内核内存。 为修复此问题，建议用户升级至 V11.3.2 或更高版本。

CVSS 8.8 · High EPSS 0.12% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
FreeRTOS FreeRTOS-Kernel 11.3.0≤ 11.3.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-109588

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
Numeric truncation of the buffer length in the MPU buffer authorization check in FreeRTOS-Kernel V11.3.0 and V11.3.1 on the Arm Cortex-R82 (Armv8-R AArch64) MPU port might allow, under certain conditions, an unprivileged task on MPU-enabled builds to read or write privileged kernel memory beyond the validated buffer window, via a stream buffer 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
数值截断错误
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-2026-109588

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-109588

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-109588 (2)

Vendor Pages for CVE-2026-109588 (1)

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

CVE-2026-109587 8.8 HIGH Incorrect authorization in the Arm Cortex-R82 MPU port 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-197

V. Comments for CVE-2026-109588

No comments yet

Leave a comment