That is incorrect. The spiritual end of Judas is spelled out in this verse, and it means exactly what it says -- a child of Hell....True his 'spiritual' end is not mentioned in scripture..
While I was with them in the world, I kept them in thy name: those that thou gavest me I have kept, and none of them is lost, but the son of perdition; that the scripture might be fulfilled. (John 17:12)
What does *lost* mean in Scripture? It means without Christ, hence damned. And to make sure that there would be no misunderstanding about the nature of Judas, the Lord had already made it clear in John 6:70,71: Jesus answered them, Have not I chosen you twelve, and one of you is a devil? He spake of Judas Iscariot the son of Simon: for he it was that should betray him, being one of the twelve.
The same term -- the son of perdition -- is applied to the Antichrist.
Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition; Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God. (2 Thess 2:3,4)
So the devil must be rolling on the floor laughing, that in a thread which is supposed to expose the lies of the devil, we have Christians misrepresenting the truth about a child of the devil -- Judas -- and making him out to be a righteous man, who might possibly even be saved after all!