A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file.
{
"sources": [
{
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-40633",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40633",
"imported": "2026-07-30T14:38:08.713Z",
"published": "2022-06-14T11:15:10.470Z",
"id": "CVE-2021-40633",
"database_specific": {
"status": "Modified"
},
"modified": "2026-06-17T04:07:11.777Z"
}
],
"license": "CC-BY-4.0"
}