Out-of-bounds write via the TLS 1.3 handshake message cache in NetX Duo in Eclipse ThreadX NetX Duo 6.5.1.202602 allows a handshake message larger than the cache writes past it and on into the rest of the session control block, which holds pointers. A malicious or compromised server can make a TLS 1.3 client produce such a message before certificate authentication completes, so no server certificate is needed to reach it.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00209.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Eclipse Foundation Eclipse ThreadX - NetX Duo unaffected
Version Status Constraints
0 affected ≤ 6.5.1.202602
6.5.2.202603 unaffected —

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-4x76-j955-qhq2 cve-icon cve-icon
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/356 cve-icon cve-icon
History

Wed, 07 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 07 Oct 2026 10:45:00 +0000

Type Values Removed Values Added
Title Out-of-Bounds Write in TLS 1.3 Handshake Message Cache of NetX Duo

Wed, 07 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
Description Out-of-bounds write via the TLS 1.3 handshake message cache in NetX Duo in Eclipse ThreadX NetX Duo 6.5.1.202602 allows a handshake message larger than the cache writes past it and on into the rest of the session control block, which holds pointers. A malicious or compromised server can make a TLS 1.3 client produce such a message before certificate authentication completes, so no server certificate is needed to reach it.
Weaknesses CWE-787
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published:

Updated: 2026-10-07T18:04:27.490Z

Reserved: 2026-09-30T14:46:53.599Z

Link: CVE-2026-103416

cve-icon Vulnrichment

Updated: 2026-10-07T18:03:50.667Z

cve-icon NVD

Status : Deferred

Published: 2026-10-07T09:17:04.647

Modified: 2026-10-07T19:17:31.577

Link: CVE-2026-103416

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T10:30:15Z

Weaknesses