FFmpeg through 8.1.2, fixed in commit 5d7112c, contains an uncontrolled resource consumption vulnerability in the IAMF demuxer that allows an unauthenticated attacker to cause multi-gigabyte memory allocation from a 17-byte input file by supplying a crafted count_label field. The mix_presentation_obu() function in libavformat/iamf_parse.c calls av_calloc(count_label, sizeof(*language_label)) with an attacker-controlled value before validating available OBU data, enabling an allocation amplification of approximately 126 million bytes per input byte that exhausts process memory or triggers an OOM-kill during format probing.
{
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"sources": [
{
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66037",
"database_specific": {
"status": "Analyzed"
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"modified": "2026-08-07T00:58:46.967Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-66037",
"imported": "2026-08-08T05:24:16.208Z",
"id": "CVE-2026-66037",
"published": "2026-07-24T20:18:20.573Z"
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{
"html_url": "https://github.com/advisories/GHSA-qqrg-chvw-q8jp",
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"modified": "2026-07-24T21:32:28Z",
"url": "https://api.github.com/advisories/GHSA-qqrg-chvw-q8jp",
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