Out-of-bounds Read Affecting libpng1.6 package, versions *
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- published23 Nov 2025
- disclosed25 Nov 2025
Introduced: 23 Nov 2025
NewCVE-2025-64506 (opens in a new tab)How to fix?
There is no fixed version for Debian:11 libpng1.6.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libpng1.6 package and not the libpng1.6 package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
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.