CVE-2025-54485CWE-121

A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa)

Critical · published August 25, 2025

CVSS v3.1
9.8
EPSS
1%
Percentile
52.0
In the wild
Unconfirmed
What it is

🚨 A single crafted MFER file can trigger a stack-based buffer overflow in libbiosig 3.9.0, causing arbitrary code execution! 🔥 Think of this like a restaurant where a chef accepts a delivery without checking the order — if a malicious ingredient slips in, it could ruin the entire dish! In this case, the MFER file delivery could lead to disastrous results for your system. An attacker could execute any code they like, effectively taking control of the system. This is an absolute game-changer — imagine someone walking into your kitchen and tampering with your recipes! The potential for damage is staggering, and the implications could be catastrophic.

Put simply

Think of this like a restaurant where a chef accepts a delivery without checking the order — if a malicious ingredient slips in, it could ruin the entire dish! In this case, the MFER file delivery could lead to disastrous results for your system. This vulnerability occurs in the MFER parsing functionality of the biosig.c code, specifically on line 8785 where an improperly handled buffer can overflow, leading to arbitrary code execution when processing MFER files.

What to do

An attacker could execute any code they like, effectively taking control of the system. This is an absolute game-changer — imagine someone walking into your kitchen and tampering with your recipes! The potential for damage is staggering, and the implications could be catastrophic. Immediately upgrade to the latest version of libbiosig that addresses this vulnerability. Conduct a thorough audit of any MFER files processed in your system to ensure no malicious files were inadvertently accepted. Implement strict validation checks on file contents to prevent similar future exploits. You’ve got this! Follow these steps and you'll be on your way to securing your system like a pro! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00682 · 52.0th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2025-08-25T13:53Z
EPSS history
Timeline
  • 25 AUG 13:53Z
    A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa)
    cvelistv5