---
id: CVE-2026-95109
title: >-
  Cortex-A7 module data validation checks only the first address of a
  caller-supplied range
summary: >-
  The Cortex-A7 MMU Modules port validates a caller-supplied buffer by
  translating **one address** — the first byte. The common Module Manager hands
  its range check the module instance, the start address and the complete byte
  size; the Cor…
severity: high
cvss: 8.5
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-125
  - CWE-787
vendor: Eclipse Foundation
product: ThreadX
affected:
  - ThreadX >= 6.1 <= 6.5.1.202602a
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-20T17:07:06.551689Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T17:07:15.973Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-95109'
references:
  - url: >-
      https://github.com/eclipse-threadx/threadx/security/advisories/GHSA-fvp6-37q5-c648
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.317Z'
---

## Overview

The Cortex-A7 MMU Modules port validates a caller-supplied buffer by translating **one address** — the first byte. The common Module Manager hands its range check the module instance, the start address and the complete byte size; the Cortex-A7 implementation discarded the instance and the size and asked the MMU a single question about the start.



A memory-protected module therefore passed any range whose first byte was user-readable, however far the rest of it reached. Privileged dispatch code then read or wrote the whole range. Because every protected-module dispatcher that consumes a buffer or an extra-parameter array goes through this one macro, the defect is not in any individual service: it is in the primitive all of them rely on.

## Affected

- `ThreadX >= 6.1 <= 6.5.1.202602a`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.