Description
In Eclipse ThreadX NetX Duo versions 6.4.5.202504 through 6.5.2.202603a, built with IPv6 path MTU discovery, the ICMPv6 Packet Too Big handler uses the destination-table entry it adds without checking that the add succeeded. A sender on the network can fill the destination table with Packet Too Big messages quoting new destinations, after which the next message makes the IP helper thread dereference a NULL pointer, crashing it on targets that fault on address 0 and stopping all network processing.
Published: 2026-11-02
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Mon, 02 Nov 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Eclipse
Eclipse threadx
Vendors & Products Eclipse
Eclipse threadx

Mon, 02 Nov 2026 15:30:00 +0000

Type Values Removed Values Added
Description In Eclipse ThreadX NetX Duo versions 6.4.5.202504 through 6.5.2.202603a, built with IPv6 path MTU discovery, the ICMPv6 Packet Too Big handler uses the destination-table entry it adds without checking that the add succeeded. A sender on the network can fill the destination table with Packet Too Big messages quoting new destinations, after which the next message makes the IP helper thread dereference a NULL pointer, crashing it on targets that fault on address 0 and stopping all network processing.
Title NULL pointer dereference in ICMPv6 Packet Too Big processing when the destination table is full
Weaknesses CWE-252
CWE-476
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published:

Updated: 2026-11-02T16:18:51.305Z

Reserved: 2026-10-21T12:07:19.133Z

Link: CVE-2026-114408

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-02T16:17:27.733

Modified: 2026-11-02T16:17:27.733

Link: CVE-2026-114408

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-02T16:30:18Z

Weaknesses