libpng: LIBPNG has a heap buffer overflow in png_set_quantize

A heap based buffer overflow flaw has been discovered in LibPNG. Prior to version 1.6.55, an out-of-bounds read vulnerability exists in the pngsetquantize API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported b...

GHSA-98CP-RJ9F-6V5G ImageMagick has has a stack-buffer-overflow in MNG encoder with oversized pallete

The patch for GHSA-7h7q-j33q-hvpf was incomplete and still allows a stack buffer overflow for the multi frame images...

libpng: LIBPNG has a heap buffer overflow in png_set_quantize

A heap based buffer overflow flaw has been discovered in LibPNG. Prior to version 1.6.55, an out-of-bounds read vulnerability exists in the pngsetquantize API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported b...

MGASA-2026-0038 Updated libpng packages fix security vulnerability

Heap buffer overflow in pngsetquantize when called with no histogram and a palette larger than twice the requested maximum number of colors. CVE-2026-25646...