---
id: CVE-2026-96402
title: >-
  USBX PIMA/MTP host class reads past its receive buffer when a device
  over-reports its object handle count
summary: >-
  A malicious USB MTP/PTP device can cause the USBX host to read past a heap
  buffer during ordinary object enumeration, leaking adjacent heap contents to
  the application or faulting on an unmapped page.
severity: medium
cvss: 5.2
cvssVector: 'CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-125
vendor: Eclipse Foundation
product: USBX
affected:
  - USBX <= 6.5.1.202602
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T15:35:40.214827Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:36:16.427Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-96402'
references:
  - url: >-
      https://github.com/eclipse-threadx/usbx/security/advisories/GHSA-2ch9-p8xv-fwp6
tags:
  - cve.org
ingestedAt: '2026-10-20T15:09:24.123Z'
---

## Overview

A malicious USB MTP/PTP device can cause the USBX host to read past a heap buffer during ordinary object enumeration, leaking adjacent heap contents to the application or faulting on an unmapped page.

## Affected

- `USBX <= 6.5.1.202602`

## Remediation

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