Biosig libbiosig 3.9.0 Nex Parser heap-based overflow

Summaryinfo

A vulnerability was found in Biosig libbiosig 3.9.0. It has been declared as critical. This issue affects some unknown processing of the component Nex Parser. Executing a manipulation can lead to heap-based overflow. This vulnerability is tracked as CVE-2025-54462. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Biosig libbiosig 3.9.0. This vulnerability affects some unknown processing of the component Nex Parser. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A heap-based buffer overflow 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 arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

The advisory is shared for download at talosintelligence.com. This vulnerability was named CVE-2025-54462 since 07/23/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/03/2025).

The vulnerability scanner Nessus provides a plugin with the ID 260417 (Linux Distros Unpatched Vulnerability : CVE-2025-54462), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (260417). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Biosig

Name

• libbiosig

Version

• 3.9.0

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion