ImageMagick is free and open-source software used for editing and manipulating digital images. "WriteUHDRImage" in "coders/uhdr.c" uses "int" arithmetic to compute the pixel buffer size. Prior to version 7.1.2-15, when image dimensions are large, the multiplication overflows 32-bit "int", causing an undersized heap allocation followed by an out-of-bounds write. This can crash the process or potentially lead to an out of bounds heap write. Version 7.1.2-15 contains a patch.