← Vulnerability feed

Vulnerability record · CVE-2025-54487 · published 25 August 2025

CVE-2025-54487: Libbiosig project libbiosig stack-based buffer overflow vulnerability

LLibbiosig Project · Libbiosig

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.

9.8 CVSS 3.1 Critical EPSS 0.68% · top 49.2% CWE-121 · Stack-based buffer overflow
9.8CVSS 3.1 base score
0.68%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234 ExploitThird Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2234

Track CVE-2025-54487 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-22891Libbiosig project libbiosig heap-based buffer overflow vulnerabilityA heap-based buffer overflow vulnerability exists in the Intan CLP parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (db9…EPSS 0.60%9.8CVE-2025-66048Libbiosig project libbiosig stack-based buffer overflow vulnerabilitySeveral stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially craft…EPSS 0.71%9.8CVE-2025-66046Libbiosig project libbiosig stack-based buffer overflow vulnerabilitySeveral stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially craft…EPSS 0.55%9.8CVE-2025-66044Libbiosig project libbiosig stack-based buffer overflow vulnerabilitySeveral stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially craft…EPSS 0.55%9.8CVE-2025-66047Libbiosig project libbiosig stack-based buffer overflow vulnerabilitySeveral stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially craft…EPSS 0.55%9.8CVE-2025-66045Libbiosig project libbiosig stack-based buffer overflow vulnerabilitySeveral stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially craft…EPSS 0.55%9.8CVE-2025-66043Libbiosig project libbiosig stack-based buffer overflow vulnerabilitySeveral stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially craft…EPSS 0.71%9.8CVE-2025-54494Libbiosig project libbiosig stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819f…EPSS 0.68%

Source: NIST National Vulnerability Database (record CVE-2025-54487), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.