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TI-2025-34284 Aliases CVE-2025-54487GHSA-9wfq-rqg3-9fm2

Stack-based buffer overflow in Biosig Project libbiosig

Priority MEDIUM 50CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00682 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
The Biosig Projectlibbiosig3.9.0; Master Branch (35a819fa)—No fix listedCNA
  • libbiosig VendorThe Biosig Project Affected 3.9.0; Master Branch (35a819fa) Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:libbiosig_project:libbiosig:*:*:*:*:*:*:*:*before 3.9.1VulnerableThe Biosig Project
  • cpe:2.3:a:libbiosig_project:libbiosig:*:*:*:*:*:*:*:* Versions before 3.9.1 Vulnerable ·The Biosig Project

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-54487
  2. 2026-10-03 Alias added: GHSA-9wfq-rqg3-9fm2

References

Exploit 1

  • TI-2025-40573 Stack-based buffer overflow in Biosig Project libbiosig CVSS 3.1CRITICAL 9.8
  • TI-2025-40572 Stack-based buffer overflow in Biosig Project libbiosig CVSS 3.1CRITICAL 9.8
  • TI-2025-40571 Stack-based buffer overflow in Biosig Project libbiosig CVSS 3.1CRITICAL 9.8
  • TI-2025-40570 Stack-based buffer overflow in Biosig Project libbiosig CVSS 3.1CRITICAL 9.8
  • TI-2025-40569 Stack-based buffer overflow in Biosig Project libbiosig CVSS 3.1CRITICAL 9.8
  • TI-2025-40568 Stack-based buffer overflow in Biosig Project libbiosig CVSS 3.1CRITICAL 9.8
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences