A heap-buffer-overflow in PushCharPixel() in /MagickCore/quantum-private.h leading to denial-of-service. https://github.com/ImageMagick/ImageMagick/issues/1857 https://github.com/ImageMagick/ImageMagick/commit/54cdc146bbe50018526770be201b56643ad58ba7 https://github.com/ImageMagick/ImageMagick/commit/651672f19c75161a6159d9b6838fd3095b6c5304 https://github.com/ImageMagick/ImageMagick6/commit/7486477aa00c5c7856b111506da075b6cdfa8b73 https://github.com/ImageMagick/ImageMagick6/commit/b466a96965afc1308a4ace93f5535c2b770f294b