---
id: CVE-2026-115403
title: >-
  NULL pointer dereference in the BSD raw IPv6 send path when the destination
  table is full
summary: >-
  In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, built with BSD
  raw socket and IPv6 support, the IPv6 raw send path uses the destination-table
  entry it adds without checking that the add succeeded. When the destination
  tab…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-252
  - CWE-476
vendor: Eclipse Foundation
product: Eclipse ThreadX
affected:
  - eclipse_threadx >= 6.0 <= 6.5.2.202603a
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T21:40:21.778Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115403'
references:
  - url: >-
      https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-9w9h-x3fh-m3fp
  - url: 'https://gitlab.eclipse.org/security/cve-assignment/-/work_items/500'
tags:
  - cve.org
epss: 0.00324
epssPercentile: 0.2554
ingestedAt: '2026-11-05T19:30:42.860Z'
---

## Overview

In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, built with BSD raw socket and IPv6 support, the IPv6 raw send path uses the destination-table entry it adds without checking that the add succeeded. When the destination table is full and an off-link destination is reached through a default router whose neighbour cache entry is unknown, sending on an IPv6 raw socket with header inclusion dereferences a NULL pointer; a remote sender can fill the table, for example with ICMPv6 Packet Too Big messages, and crash the sending thread.

## Affected

- `eclipse_threadx >= 6.0 <= 6.5.2.202603a`

## Remediation

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