Stack-Based Buffer Overflow in Biosig Project's Library Affects Users
CVE-2025-54491

9.8CRITICAL

Key Information:

Vendor

The BiOSig Project

Status
LibbiOSig
Vendor
CVE Published:
25 August 2025

What is CVE-2025-54491?

A stack-based buffer overflow vulnerability arises in the MFER parsing functionality of the Biosig Project's libbiosig. This issue, found in version 3.9.0 and the Master Branch (35a819fa), allows attackers to exploit a specially crafted MFER file. When a malicious file is processed, it can lead to arbitrary code execution. The vulnerability surfaces specifically when the Tag is 65, impacting the processing logic in biosig.c. Safeguarding against this threat involves monitoring file inputs and strengthening validation protocols.

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-2025-54491 : Stack-Based Buffer Overflow in Biosig Project's Library Affects Users