CVE-2025-52461 Information disclosure in libbiosig

High 8.2 Published 25 Aug 2025 Updated 3 Nov 2025

An out-of-bounds read in libbiosig allows attackers to leak information via a crafted .nex file, affecting applications using this library.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2025-52461?

CVE-2025-52461 is a high-severity vulnerability in The Biosig Project libbiosig, published on 25 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An out-of-bounds read vulnerability exists in the Nex parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted .nex file can lead to an information leak. An attacker can provide a malicious file to trigger this vulnerability.

Weakness: CWE-125

Which versions are affected by CVE-2025-52461?

It affects 1 product.

Products include Libbiosig Project Libbiosig.

How do I fix CVE-2025-52461?

Upgrade to a fixed version.

Is CVE-2025-52461 being exploited?

There is no known exploitation of CVE-2025-52461 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2025-52461, GHSA-6x55-q68x-g6jc, UBUNTU-CVE-2025-52461.