fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.
{
"sources": [
{
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34085",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34085",
"modified": "2026-03-27T21:39:33.240Z",
"id": "CVE-2026-34085",
"imported": "2026-04-11T04:05:18.497Z",
"published": "2026-03-25T17:17:09.210Z"
}
],
"license": "CC-BY-4.0"
}