CVE catalog

CVE-2025-66044

biosig: CVE-2025-66044

Severity: Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Dec 11, 2025, 5:15:58 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.55% · Oct 25, 2026

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 64

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	biosig	sid	`3.9.5-1`	fixed
Debian	biosig	forky	`3.9.5-1`	fixed
Debian	biosig	trixie	`3.9.0-1`	vulnerable
Debian	biosig	bookworm	`2.5.0-1`	vulnerable
Cpe	libbiosig	Not reported	`3.9.2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	biosig	source	sid	`3.9.5-1`	not yet assigned	Not reported	[1122863]
Debian	biosig	source	forky	`3.9.5-1`	not yet assigned	Not reported	[1122863]
Debian	biosig	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1122863]
Debian	biosig	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1122863]
Cpe	libbiosig	cpe	Not reported	`3.9.2`	Not reported	NVD-CVE-2025-66044	Not reported

[Debian bug #1122863]

Notes

[trixie] biosig: Minor issue [bookworm] biosig: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[biosig-tools]Affected
Source package: [biosig]
Details (2)
- 2.5.0-1+b1 · amd64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
- 2.5.0-1+b1 · arm64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
[libbiosig3]Affected
Source package: [biosig]
Details (2)
- 2.5.0-1+b1 · amd64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
- 2.5.0-1+b1 · arm64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
[libbiosig-dev]Affected
Source package: [biosig]
Details (2)
- 2.5.0-1+b1 · amd64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
- 2.5.0-1+b1 · arm64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
[octave-biosig]Affected
Source package: [biosig]
Details (2)
- 2.5.0-1+b1 · amd64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
- 2.5.0-1+b1 · arm64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
[python3-biosig]Affected
Source package: [biosig]
Details (2)
- 2.5.0-1+b1 · amd64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12
- 2.5.0-1+b1 · arm64 · bookworm
  Affected
  dsa · biosig · debian · bookworm; dsa · biosig · debian · 12

[Debian 13 (Trixie)]

[biosig-tools]Affected
Source package: [biosig]
Details (2)
- 3.9.0-1 · amd64 · trixie
  Affected
  dsa · biosig · debian · 13
- 3.9.0-1 · arm64 · trixie
  Affected
  dsa · biosig · debian · 13
[libbiosig3]Affected
Source package: [biosig]
Details (2)
- 3.9.0-1 · amd64 · trixie
  Affected
  dsa · biosig · debian · 13
- 3.9.0-1 · arm64 · trixie
  Affected
  dsa · biosig · debian · 13
[libbiosig-dev]Affected
Source package: [biosig]
Details (2)
- 3.9.0-1 · amd64 · trixie
  Affected
  dsa · biosig · debian · 13
- 3.9.0-1 · arm64 · trixie
  Affected
  dsa · biosig · debian · 13
[octave-biosig]Affected
Source package: [biosig]
Details (2)
- 3.9.0-1 · amd64 · trixie
  Affected
  dsa · biosig · debian · 13
- 3.9.0-1 · arm64 · trixie
  Affected
  dsa · biosig · debian · 13
[python3-biosig]Affected
Source package: [biosig]
Details (2)
- 3.9.0-1 · amd64 · trixie
  Affected
  dsa · biosig · debian · 13
- 3.9.0-1 · arm64 · trixie
  Affected
  dsa · biosig · debian · 13

Observed: Oct 24, 2026, 8:18:17 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]