LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, a heap buffer over-read vulnerability exists in libpng's pngwriteimage8bit function when processing 8-bit images through the simplified write API with convertto_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.
{
"license": "CC-BY-4.0",
"sources": [
{
"id": "CVE-2025-64506",
"imported": "2025-11-27T03:28:04.930Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-64506",
"modified": "2025-11-26T18:34:38.240Z",
"published": "2025-11-25T00:15:47.300Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64506"
}
]
}