CVE-2025-64736 Information disclosure in libbiosig

Medium 6.1 Published 3 Mar 2026 Updated 3 Mar 2026

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

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2025-64736?

CVE-2025-64736 is a medium-severity vulnerability in The Biosig Project libbiosig, published on 3 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

An out-of-bounds read vulnerability exists in the ABF parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (5462afb0). A specially crafted .abf 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-2025-64736?

It affects 1 product.

Products include Libbiosig Project Libbiosig.

How do I fix CVE-2025-64736?

Apply the vendor's patch.

Is CVE-2025-64736 being exploited?

There is no known exploitation of CVE-2025-64736 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2025-64736, GHSA-p3cr-g43c-99g8, UBUNTU-CVE-2025-64736.