CVE-2025-54493

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 9184 of biosig.c on the current master branch (35a819fa), when the Tag is 131:

                else if (tag==131)    //0x83
                {
                    // Patient Age
                    if (len!=7) fprintf(stderr,"Warning MFER tag131 incorrect length %i!=7\n",len);
                    curPos += ifread(buf,1,len,hdr);