  convert_bytes_to_data( png_structp    png,
                         png_row_infop  row_info,
                         png_bytep      data )
  {
    unsigned int  i;

    FT_UNUSED( png );


    for ( i = 0; i < row_info->rowbytes; i += 4 )
    {
      unsigned char*  base  = &data[i];
      unsigned int    red   = base[0];
      unsigned int    green = base[1];
      unsigned int    blue  = base[2];


      base[0] = blue;
      base[1] = green;
      base[2] = red;
      base[3] = 0xFF;
    }
  }

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.