CVE catalog

CVE-2025-54481

biosig: CVE-2025-54481

Severity: Medium
Published: Aug 25, 2025, 2:15:33 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.71% · 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 8744 of biosig.c on the current master branch (35a819fa), when the Tag is 3: else if (tag==3) { // character code char v[17]; // [1] if (len>16) fprintf(stderr,"Warning MFER tag2 incorrect length %i>16\n",len); curPos += ifread(&v,1,len,hdr); v[len] = 0; In this case, the overflowed buffer is the newly-declared `v` \[1\] instead of `buf`. Since `v` is only 17 bytes large, much smaller values of `len` (even those encoded using a single octet) can trigger an overflow 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]