  Direct_Move( EXEC_OP_ TT_GlyphZone  zone,
                        FT_UShort     point,
                        FT_F26Dot6    distance )
  {
    FT_F26Dot6  v;


#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
    FT_ASSERT( !CUR.face->unpatented_hinting );
#endif

    v = CUR.GS.freeVector.x;

    if ( v != 0 )
    {
      zone->cur[point].x += TT_MULDIV( distance,
                                       v * 0x10000L,
                                       CUR.F_dot_P );

      zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
    }

    v = CUR.GS.freeVector.y;

    if ( v != 0 )
    {
      zone->cur[point].y += TT_MULDIV( distance,
                                       v * 0x10000L,
                                       CUR.F_dot_P );

      zone->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.