Stack-Based Buffer Overflow in Biosig Project's Libbiosig Affects Multiple Versions
CVE-2025-54484

9.8CRITICAL

Key Information:

Vendor

The BiOSig Project

Status
LibbiOSig
Vendor
CVE Published:
25 August 2025

What is CVE-2025-54484?

A stack-based buffer overflow vulnerability appears in the MFER parsing functionality of the Biosig Project's libbiosig version 3.9.0 and the current master branch (35a819fa). An attacker may exploit this vulnerability by providing a specially crafted MFER file, leading to potential arbitrary code execution. The vulnerability is particularly evident in the code execution pathway at line 8779 of biosig.c when a specific tag (6) is processed, which fails to handle certain input lengths correctly. This oversight could allow an attacker to manipulate the application’s execution flow.

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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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