Stack-Based Buffer Overflow in Biosig Project's Parsing Functionality
CVE-2025-54485

9.8CRITICAL

Key Information:

Vendor

The BiOSig Project

Status
LibbiOSig
Vendor
CVE Published:
25 August 2025

What is CVE-2025-54485?

A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of libbiosig, specifically affecting version 3.9.0 and the master branch (35a819fa). By providing a specially crafted MFER file, an attacker may exploit this flaw to trigger arbitrary code execution. The vulnerability is prominent in the implementation of the parsing logic, particularly visible when the Tag is set to 8, leading to potential security risks and system compromise.

Affected Version(s)

libbiosig 3.9.0

libbiosig Master Branch (35a819fa)

References

https://talosintelligence.com/vulnerability_reports/TALOS...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Discovered by Mark Bereza and Lilith >_> of Cisco Talos.
.
CVE-2025-54485 : Stack-Based Buffer Overflow in Biosig Project's Parsing Functionality