---
id: CVE-2026-102709
title: >-
  Improper validation of non-secure (NS) pointers in multiple TrustZone-M
  non-secure callable (NSC) entry functions allows an attacker executing in the
  non-secure world to supply pointers to secure memory
summary: >-
  Improper validation of non-secure (NS) pointers in multiple TrustZone-M
  non-secure callable (NSC) entry functions allows an attacker executing in the
  non-secure world to supply pointers to secure memory. The secure firmware
  subsequently …
severity: high
cvss: 8.4
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N'
cwe:
  - CWE-200
  - CWE-501
  - CWE-822
vendor: Eclipse Foundation
product: ThreadX
affected:
  - ThreadX <= 6.5.1.202602
published: '2026-09-29'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T21:17:05.047'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102709'
references:
  - url: >-
      https://github.com/eclipse-threadx/threadx/security/advisories/GHSA-ffg5-m7vh-vwrp
    label: emo@eclipse.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-30T20:38:55.280355Z'
cvssSource: cna
epss: 0.00104
epssPercentile: 0.01016
ingestedAt: '2026-09-29T17:41:02.215Z'
---

## Overview

Improper validation of non-secure (NS) pointers in multiple TrustZone-M non-secure callable (NSC) entry functions allows an attacker executing in the non-secure world to supply pointers to secure memory. The secure firmware subsequently dereferences these attacker-controlled pointers without verifying that they reference non-secure memory, resulting in unintended disclosure of secure memory contents. This violates the isolation guarantees provided by Arm TrustZone-M and can be leveraged as a memory disclosure or corruption primitive that may enable recovery of sensitive cryptographic material.

## Remediation

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