CVE-2025-54484CWE-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 crafty MFER file can crash your system and let attackers run wild! This stack-based buffer overflow in libbiosig 3.9.0 is a serious security hiccup waiting to happen. 🔥 Think of this vulnerability like a delivery truck that's supposed to deliver just the right number of packages. If the truck is overloaded with more than it can carry, it can spill its contents all over the road, causing chaos. Here, an overly large MFER file can cause the application to overflow and execute arbitrary code! An attacker could exploit this flaw to execute malicious code, gain unauthorized access, or even take control of your entire system! This isn't just a nuisance; it could lead to data breaches or devastating service disruptions!

Put simply

Think of this vulnerability like a delivery truck that's supposed to deliver just the right number of packages. If the truck is overloaded with more than it can carry, it can spill its contents all over the road, causing chaos. Here, an overly large MFER file can cause the application to overflow and execute arbitrary code! The vulnerability arises from a stack-based buffer overflow in the MFER parsing functionality, specifically when handling files tagged with a value of 6. If the length of the input exceeds expected limits, it can overwrite the stack and lead to arbitrary code execution.

What to do

An attacker could exploit this flaw to execute malicious code, gain unauthorized access, or even take control of your entire system! This isn't just a nuisance; it could lead to data breaches or devastating service disruptions! Immediate action is required: update to the latest version of libbiosig that addresses this vulnerability. Ensure you audit any MFER files being processed, and implement checks to limit file size before parsing. 🛡️ You've got this! By following these steps, you can secure your system and keep attackers at bay! 🔒✨

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