OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In CompositeDeepScanLine::readPixels, per-pixel totals are accumulated in vector<unsigned int> totalsizes for attacker-controlled large counts across many parts, totalsizes[ptr] wraps modulo 2^32. overallsamplecount is then derived from wrapped totals and used in samples[channel].resize(overallsamplecount). Decode pointer setup/consumption proceeds with true sample counts, and write operations in core unpack (genericunpackdeep_pointers) overrun the undersized composite sample buffer. This vulnerability is fixed in v3.2.6, v3.3.8, and v3.4.6.
{
"license": "CC-BY-4.0",
"sources": [
{
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27622",
"published": "2026-03-03T23:15:55.737Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27622",
"id": "CVE-2026-27622",
"modified": "2026-03-05T21:07:05.753Z",
"imported": "2026-04-17T13:59:24.512Z",
"database_specific": {
"status": "Analyzed"
}
}
]
}