Yes, you can use CWM to flash the official ROM. As Izzy linked, this question is our guide to finding ROMs for devices. In particular, you can find stock Samsung ROMs easily on SamMobile: there are different ROMs for each particular type of Note 2 and each country, so be sure to pick the right one for your device and location.

Also, it may be worth sticking with Cyanogenmod. Many new users don't appreciate how great the difference is between a nightly/snapshot build and a stable release. If you've been using a nightly or a beta, and a release candidate or stable release is available for your device, you might want to try that out before going back to stock. At the very least, you might consider filing a bug report for the boot loop you've observed. If nobody reports it, it may never be fixed.

Yes, you can use CWM to flash the official ROM. As Izzy linked, this question is our guide to finding ROMs for devices. In particular, you can find stock Samsung ROMs easily on SamMobile: there are different ROMs for each particular type of Note 2 and each country, so be sure to pick the right one for your device and location.

Also, it may be worth sticking with Cyanogenmod. Many new users don't appreciate how great the difference is between a nightly/snapshot build and a stable release. If you've been using a nightly or a beta, and a release candidate or stable release is available for your device, you might want to try that out before going back to stock. At the very least, you might consider filing a bug report for the boot loop you've observed. If nobody reports it, it may never be fixed.