void GfxCalRGBColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  GfxRGB rgb;
  GfxColorComp c, m, y, k;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_CMYK) {
    double in[gfxColorMaxComps];
    Guchar out[gfxColorMaxComps];
    double X, Y, Z;
    
    getXYZ(color,&X,&Y,&Z);
    in[0] = clip01(X);
    in[1] = clip01(Y);
    in[2] = clip01(Z);
    XYZ2DisplayTransform->doTransform(in,out,1);
    cmyk->c = byteToCol(out[0]);
    cmyk->m = byteToCol(out[1]);
    cmyk->y = byteToCol(out[2]);
    cmyk->k = byteToCol(out[3]);
    return;
  }
#endif
  getRGB(color, &rgb);
  c = clip01(gfxColorComp1 - rgb.r);
  m = clip01(gfxColorComp1 - rgb.g);
  y = clip01(gfxColorComp1 - rgb.b);
  k = c;
  if (m < k) {
    k = m;
  }
  if (y < k) {
    k = y;
  }
  cmyk->c = c - k;
  cmyk->m = m - k;
  cmyk->y = y - k;
  cmyk->k = k;
}

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