I was not responding to &quot;the mainstream OS OpenBSD ...&quot;. Let&#x27;s go back to your remark, which preceded his:<p><i>kernel exploits for OpenBSD are neither theoretical nor impractical.</i><p>You put that out there as a bare, standalone statement. No elaboration, no proof.<p>Your comment might be true, but I would have liked to see some more &quot;meat&quot; in it. Some supporting evidence, some inkling of a truly wonderful proof.