Stack-Based Buffer Overflow in Biosig Project's libbiosig Product
CVE-2025-54488

9.8CRITICAL

Key Information:

Vendor

The BiOSig Project

Status
LibbiOSig
Vendor
CVE Published:
25 August 2025

What is CVE-2025-54488?

A stack-based buffer overflow vulnerability has been identified in the MFER parsing mechanism of libbiosig version 3.9.0 and the latest Master Branch (commit 35a819fa). This flaw allows an attacker to exploit a specially crafted MFER file, potentially resulting in arbitrary code execution on the affected system. This issue occurs specifically when processing a particular tag, where improper length handling can lead to an overflow condition. Addressing this vulnerability is critical to maintaining system integrity and preventing unauthorized access.

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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.
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