CVE-2025-52461

An out-of-bounds read vulnerability exists in the Nex parsing functionality of The Biosig Project...

8.2 HighFix available

An out-of-bounds read vulnerability exists in the Nex parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted .nex file can lead to an information leak. An attacker can provide a malicious file to trigger this vulnerability.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: High

Exploit likelihood

0.51%Up 0.5 points since Aug 26, 2025

What each source reports

CVE List Score used 8.2

Record: CVE-2025-52461
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness: CWE-125
Updated: 2026-11-02

EUVDEUVD-2025-25687 8.2

Record: EUVD-2025-25687
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-6x55-q68x-g6jc 8.2

An out-of-bounds read vulnerability exists in the Nex parsing functionality of The Biosig Project...

Record: GHSA-6x55-q68x-g6jc
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness: CWE-125
Updated: 2026-11-02

NVD 8.2

Record: CVE-2025-52461
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness: CWE-125
Updated: 2026-11-02

OSV 9.1

Record: CVE-2025-52461
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2025-52461 9.1

Record: DEBIAN-CVE-2025-52461
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-52461 8.2

Record: UBUNTU-CVE-2025-52461
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`biosig` Debian:12	All versions, plus listed versions 2.5.0-12.5.2-12.5.2-22.6.0-12.6.1-13.9.0-13.9.5-1	None known
`biosig` Debian:13	All versions, plus listed versions 3.9.0-13.9.5-1	None known
`biosig` Debian:14	before 3.9.5-1, plus listed versions 3.9.0-1	3.9.5-1
`biosig` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 2.1.2-42.1.2-4build12.1.2-4build22.3.3-12.3.3-1build12.3.3-1build22.3.3-1ubuntu0.1~esm1	None known
`biosig` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 2.5.0-1build22.5.2-12.5.2-1build12.5.2-22.6.0-12.6.0-1build12.6.0-1ubuntu12.6.0-1ubuntu1+esm1	None known
`biosig` Ubuntu:25.10	All versions, plus listed versions 2.6.1-1build33.9.0-1	None known
`biosig` Ubuntu:26.10	All versions, plus listed versions 3.9.0-1build33.9.5-13.9.5-1build1	None known
`biosig` Ubuntu:Pro:26.04:LTS	All versions, plus listed versions 3.9.0-13.9.0-1build13.9.0-1build23.9.0-1build33.9.0-1ubuntu0.1~esm1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-52461 is a high vulnerability (CVSS 8.2) in Libbiosig Project Libbiosig, published August 25, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. Fixed in biosig 3.9.5-1.