png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr,
   png_error_ptr error_fn, png_error_ptr warn_fn)
{

#ifdef PNG_USER_MEM_SUPPORTED
   return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn,
      warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL));
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.