Calm down, Chik. You did nothing wrong here. Nothing.
If your X texts/emails you about the info that you gave to the creditors....ignore it.
If the situation is one in which you cannot ignore....tell him that he shouldn't buy shit that he can't pay for.
It is NOT your job to protect the guy. It isn't as if you are calling his creditors and telling them where to find him or posting your X's contact information on a public forum...as in "HEY. If X owes you money, you can find him at XXX", right?
It is an accountability and entitlement issue. *His*, not yours. I doubt that the creditors would reveal *how* they got the info on your x's whereabouts....but even if they do and your ex tries to make it about *you* and your loose tongue, please understand that is just blame-shifting on his part.
If your ex is served and is upset with you then you need to have a plan. If he calls/texts/emails you about it, tell him that you have nothing to say and that he needs to deal with his shit and stop contacting you about it. If he is relentless, then look into a restraining order. If he is in your physical presence and starts being belligerent or threatening....call the cops.
Actions. meet. Consequences......"Oh, what a tangled web we weave when first we practice to deceive." - Sir Walter Scott
In my effort to be *concise*, I often come off as blunt and harsh. Sorry, don't mean to be offensive.