PT-2025-50640 · Libbiosig+1 · Libbiosig+1

Mark Bereza · Published 2025-12-11 · Updated 2025-12-13 · CVE-2025-66043

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions The Biosig Project libbiosig version 3.9.1

Description Several stack-based buffer overflow vulnerabilities exist in the MFER parsing functionality. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities when the Tag is 3.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Stack Overflow

Weakness Enumeration

CWE-787

CWE-121

Related Identifiers

CVE-2025-66043

Affected Products

Debian

Libbiosig

References · 12

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2025-2296 · Exploit
• https://cve.org/CVERecord?id=CVE-2025-66043 · Security Note
• https://ubuntu.com/security/CVE-2025-66043 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-66043 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-66043 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66043 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-66043 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-66043 · Vendor Advisory
• https://sourceforge.net/p/biosig/mailman/message/59271419 · Note
• https://t.me/CVEtracker/39498 · Telegram Post
• https://twitter.com/CVEnew/status/1999876894800367694 · Twitter Post
• https://twitter.com/CveFindCom/status/1999172284834091218 · Twitter Post