---
id: CVE-2026-102762
title: The NetX Duo MQTT client leaks the packet carrying a malformed PUBLISH message
summary: >-
  The NetX Duo MQTT client leaks the packet carrying a malformed PUBLISH
  message. Each malformed PUBLISH costs one packet, or one chain of packets,
  from the network driver's receive pool, and nothing returns it. A peer that
  can deliver a f…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-401
vendor: Eclipse Foundation
product: NetX Duo
affected:
  - netx_duo >= 6.0 <= 6.5.1.202602
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T18:17:13.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102762'
references:
  - url: >-
      https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-9v23-qwp9-2q3h
    label: emo@eclipse.org
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-29T17:41:02.216Z'
---

## Overview

The NetX Duo MQTT client leaks the packet carrying a malformed PUBLISH message. Each malformed PUBLISH costs one packet, or one chain of packets, from the network driver's receive pool, and nothing returns it. A peer that can deliver a few dozen such messages exhausts the pool and stops all inbound network traffic on the device until it is rebooted.

## Remediation

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