void GfxLabColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  GfxRGB rgb;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_GRAY) {
    Guchar out[gfxColorMaxComps];
    double in[gfxColorMaxComps];
    
    getXYZ(color, &in[0], &in[1], &in[2]);
    XYZ2DisplayTransform->doTransform(in,out,1);
    *gray = byteToCol(out[0]);
    return;
  }
#endif
  getRGB(color, &rgb);
  *gray = clip01((GfxColorComp)(0.299 * rgb.r +
				0.587 * rgb.g +
				0.114 * rgb.b + 0.5));
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.