# CVE-2025-66046: biosig: Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project li...

CVE-2025-66046 is fixed in biosig on 1 platform by DEBIAN-CVE-2025-66046 (version 3.9.5-1), released December 11, 2025. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2025-66046
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0055
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 11, 2025

## Description

Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 67

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | biosig Debian 14 | 3.9.5-1 | [DEBIAN-CVE-2025-66046](https://patchblox.com/security/data/fix/linux/debian-cve-2025-66046.md) | Dec 11, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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