  Move_Zp2_Point( EXEC_OP_ FT_UShort   point,
                           FT_F26Dot6  dx,
                           FT_F26Dot6  dy,
                           FT_Bool     touch )
  {
#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
    if ( CUR.face->unpatented_hinting )
    {
      if ( CUR.GS.both_x_axis )
      {
        CUR.zp2.cur[point].x += dx;
        if ( touch )
          CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
      }
      else
      {
        CUR.zp2.cur[point].y += dy;
        if ( touch )
          CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y;
      }
      return;
    }
#endif

    if ( CUR.GS.freeVector.x != 0 )
    {
      CUR.zp2.cur[point].x += dx;
      if ( touch )
        CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
    }

    if ( CUR.GS.freeVector.y != 0 )
    {
      CUR.zp2.cur[point].y += dy;
      if ( touch )
        CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y;
    }
  }

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.