adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.
{
"sources": [
{
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-38171",
"database_specific": {
"status": "Modified"
},
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38171",
"published": "2021-08-21T17:15:07.700Z",
"id": "CVE-2021-38171",
"modified": "2026-06-17T04:01:41.430Z",
"imported": "2026-07-17T20:34:47.402Z"
}
],
"license": "CC-BY-4.0"
}