{"id":"DEBIAN-CVE-2025-64720","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, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 required by the simplified PNG API. This issue has been patched in version 1.6.51.","modified":"2026-09-01T16:06:20.720281010Z","published":"2025-11-25T00:15:47.460Z","upstream":["CVE-2025-64720"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-64720"}],"affected":[{"package":{"name":"libpng1.6","ecosystem":"Debian:12","purl":"pkg:deb/debian/libpng1.6?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.39-2+deb12u1"}]}],"versions":["1.6.39-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-64720.json"}},{"package":{"name":"libpng1.6","ecosystem":"Debian:13","purl":"pkg:deb/debian/libpng1.6?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.48-1+deb13u1"}]}],"versions":["1.6.48-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-64720.json"}},{"package":{"name":"libpng1.6","ecosystem":"Debian:14","purl":"pkg:deb/debian/libpng1.6?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.51-1"}]}],"versions":["1.6.48-1","1.6.49-1~exp1","1.6.50-1","1.6.50-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-64720.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"}]}