Stack-Based Buffer Overflow in The Biosig Project libbiosig Software
CVE-2025-54493

9.8CRITICAL

Key Information:

Vendor

The BiOSig Project

Status
LibbiOSig
Vendor
CVE Published:
25 August 2025

What is CVE-2025-54493?

A stack-based buffer overflow vulnerability is present in the MFER parsing functionality of The Biosig Project's libbiosig version 3.9.0 and the Master Branch (35a819fa). This issue arises when processing a specially crafted MFER file, potentially allowing an attacker to execute arbitrary code. The vulnerability triggers during the handling of specific MFER tags, particularly noticeable in the code at line 9184 of biosig.c, where improper length verification of input data can lead to exploitable conditions.

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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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