CVE-2025-54484

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 8779 of biosig.c on the current master branch (35a819fa), when the Tag is 6:

				else if (tag==6) 	// 0x06 "number of sequences"
				{
					// NRec
					if (len>4) fprintf(stderr,"Warning MFER tag6 incorrect length %i>4\n",len);
					curPos += ifread(buf,1,len,hdr);