Here is a letter signed by 50 former high ranking intelligence officials - it's easy to absorb and if you're interested, it will give you plenty of threads to Google.
https://www.politico.com/f/?id=00000175-4393-d7aa-af77-579f9...
https://www.politico.com/f/?id=00000175-4393-d7aa-af77-579f9...
It seems like the information is really up in the air, it will take time to determine what conclusions from it are legitimate and false. The information itself is quite clearly real, at least, I haven't seen any specific piece of information in regards to this claimed as false, just the whole subject referred to as "disinformation".