CVE-2026-85438 MOOS-IvP through 24.8.1 Out-of-Bounds Write via Unvalidated IvP Payload Counts

Critical 9.3 Published 3 Sep 2026 Updated 14 Sep 2026

Attackers can trigger memory corruption and potential code execution in MOOS-IvP by sending crafted IvP payloads with invalid dimension counts.

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-2026-85438?

CVE-2026-85438 is a critical memory corruption vulnerability in moos-ivp, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

MOOS-IvP through 24.8.1 contains a buffer overflow vulnerability in StringToIvPFunction() where dimension, piece, and degree counts from encoded BHV_IPF payloads are used as allocation sizes and loop bounds without validation. Attackers can supply crafted payloads with mismatched dimension values to write attacker-controlled doubles past the end of the IvPBox weight array, causing memory corruption and potential code execution.

Weakness: CWE-190

Which versions are affected by CVE-2026-85438?

It affects 1 product.

Products include Mit Moos-Ivp.

How do I fix CVE-2026-85438?

No fix has been published for CVE-2026-85438 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-2026-85438 being exploited?

There is no known exploitation of CVE-2026-85438 in the wild and no public exploit code.

Sources

Also known as GHSA-fhxv-4m7f-gpmr.