CVE-2026-103416

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.

• https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-4x76-j955-qhq2
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/356