CVE-2025-54494CWE-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
51.9
In the wild
Unconfirmed
What it is

🚨 A single crafted MFER file can send your system spiraling into chaos with arbitrary code execution! 🔥 Think of it like a malicious chef slipping a toxic ingredient into your recipe without you noticing. If you don’t check the source of your ingredients, you might end up with a dish that could spoil the entire meal! An attacker could exploit this vulnerability to run any code they choose on your system, potentially compromising sensitive information or taking control of the device entirely. It's a nightmare scenario waiting to happen and could have devastating consequences for your data integrity!

Put simply

Think of it like a malicious chef slipping a toxic ingredient into your recipe without you noticing. If you don’t check the source of your ingredients, you might end up with a dish that could spoil the entire meal! The vulnerability originates from a stack-based buffer overflow in the MFER parsing functionality of the Biosig Project's libbiosig version 3.9.0. When a MFER file with a specific structure (tag 133) is processed, it can lead to uncontrolled memory writes, allowing for arbitrary code execution.

What to do

An attacker could exploit this vulnerability to run any code they choose on your system, potentially compromising sensitive information or taking control of the device entirely. It's a nightmare scenario waiting to happen and could have devastating consequences for your data integrity! Patch to version 3.9.1 or higher to close this vulnerability, and conduct a code audit of any MFER file handling processes. Additionally, consider implementing stricter validation checks on file formats before processing them. You've got this! Follow these steps, and you'll secure your system against this critical vulnerability in no time! 🛡️

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 · 51.9th 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