Update 2: January 18, 2023 – The Galaxy Z Fold 3 is now getting the January 2023 security update in Europe. The latest update is rolling out with version F926BXXS2DWA3.
— SamLatestUpdates (@latestsamupdate) January 18, 2023
Update 1: January 18, 2023: The first Note smartphone that received the January 2023 security patch from Samsung was the Galaxy Note 10 series. After that, the security patch was rolled out for the Galaxy A52, Galaxy A73, Galaxy Note 20, Galaxy S10, Galaxy S21, and Galaxy S22.
As per the changelog, the all-new update is rolling with firmware version F926BXXS2DWA3 and it fixes dozens of security vulnerabilities. Other countries will soon get this update.
If you have Galaxy Z Fold 3 in the above-mentioned countries so you can just tap Settings -> Software update -> Download and install and enjoy the latest changes in your device.