CVE catalog

CVE-2025-54487

biosig: CVE-2025-54487

Severity: Medium
Published: Aug 25, 2025, 2:15:34 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.68% · Oct 25, 2026

A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.This vulnerability manifests on line 8842 of biosig.c on the current master branch (35a819fa), when the Tag is 12: else if (tag==12) //0x0C { // sampling resolution if (len>6) fprintf(stderr,"Warning MFER tag12 incorrect length %i>6\n",len); val32 = 0; int8_t v8; curPos += ifread(&UnitCode,1,1,hdr); curPos += ifread(&v8,1,1,hdr); curPos += ifread(buf,1,len-2,hdr); In addition to values of `len` greater than 130 triggering a buffer overflow, a value of `len` smaller than 2 will also trigger a buffer overflow due to an integer underflow when computing `len-2` in this code path.

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

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	[1112133]
Debian	biosig	source	forky	`3.9.5-1`	not yet assigned	Not reported	[1112133]
Debian	biosig	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1112133]
Debian	biosig	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1112133]

[Debian bug #1112133]

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, 7:23:50 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]