{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.9.1"
              }
            ]
          }
        ]
      }
    }
  ],
  "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 8970 of biosig.c on the current master branch (35a819fa), when the Tag is 63:\r\n\r\n                else if (tag==63) {\r\n                    uint8_t tag2=255, len2=255;\r\n\r\n                    count = 0;\r\n                    while ((count\u003clen) \u0026\u0026 !(FlagInfiniteLength \u0026\u0026 len2==0 \u0026\u0026 tag2==0)){\r\n                        curPos += ifread(\u0026tag2,1,1,hdr);\r\n                        curPos += ifread(\u0026len2,1,1,hdr);\r\n                        if (VERBOSE_LEVEL==9)\r\n                            fprintf(stdout,\"MFER: tag=%3i chan=%2i len=%-4i tag2=%3i len2=%3i curPos=%i %li count=%4i\\n\",tag,chan,len,tag2,len2,curPos,iftell(hdr),(int)count);\r\n\r\n                        if (FlagInfiniteLength \u0026\u0026 len2==0 \u0026\u0026 tag2==0) break;\r\n\r\n                        count  += (2+len2);\r\n                        curPos += ifread(\u0026buf,1,len2,hdr);\r\n\r\nHere, the number of bytes read is not the Data Length decoded from the current frame in the file (`len`) but rather is a new length contained in a single octet read from the same input file (`len2`). Despite this, a stack-based buffer overflow condition can still occur, as the destination buffer is still `buf`, which has a size of only 128 bytes, while `len2` can be as large as 255.",
  "id": "CVE-2025-54489",
  "modified": "2026-03-10T21:51:31.469686450Z",
  "published": "2025-08-25T14:15:35.233Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2234"
    },
    {
      "type": "EVIDENCE",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}