CVE-2025-55081 Potential out of bound read in _nx_secure_tls_process_clienthello()

Medium 6.9 Published 15 Oct 2025 Updated 15 Oct 2025

An attacker can trigger an out-of-bounds read in the TLS client hello processing, potentially causing a denial of service or information disclosure in ThreadX RTOS.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-55081?

CVE-2025-55081 is a medium-severity memory corruption vulnerability in Eclipse Foundation NetX Duo, published on 15 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Eclipse Foundation NextX Duo before 6.4.4, a module of ThreadX, the _nx_secure_tls_process_clienthello() function was missing length verification of certain SSL/TLS client hello message: the ciphersuite length and compression method length. In case of an attacker-crafted message with values outside of the expected range, it could cause an out-of-bound read.

Weakness: CWE-125, CWE-126

Which versions are affected by CVE-2025-55081?

It affects 1 product.

Products include Eclipse Threadx Netx Duo.

How do I fix CVE-2025-55081?

No fix has been published for CVE-2025-55081 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-55081 being exploited?

There is no known exploitation of CVE-2025-55081 in the wild and no public exploit code.

Sources

Also known as GHSA-5vrv-8j5h-h6h6.