{"id":"CVE-2025-54481","details":"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:\r\n\r\n\t\t\t\telse if (tag==3) {\r\n\t\t\t\t\t// character code\r\n\t\t\t\t\tchar v[17];\t\t// [1]\r\n\t\t\t\t\tif (len\u003e16) fprintf(stderr,\"Warning MFER tag2 incorrect length %i\u003e16\\n\",len);\r\n\t\t\t\t\tcurPos += ifread(&v,1,len,hdr);\r\n\t\t\t\t\tv[len]  = 0;\r\n\r\nIn 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.","modified":"2026-04-10T05:29:37.309280Z","published":"2025-08-25T14:15:33.700Z","references":[{"type":"WEB","url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2234"},{"type":"EVIDENCE","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-54481.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"3.9.1"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}