{"id":"AZL-70841","summary":"CVE-2025-64506 affecting package fltk 1.3.8-1","details":"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 png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_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.","modified":"2026-04-01T05:22:30.352085Z","published":"2025-11-25T00:15:47Z","upstream":["CVE-2025-64506"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-64506"}],"affected":[{"package":{"name":"fltk","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/fltk"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.3.8-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-70841.json"}}],"schema_version":"1.7.5"}