Apple has taken the unusual step of releasing an update just days after a major release, with watchOS 10.0.1, iOS 17.0.1, and iPadOS 17.0.1 now available with the set again patching a trio of exploited security flaws.
Generally, sub-point updates like Thursday's updates contain urgent fixes, or security updates. These updates go beyond the normal "this update includes bug fixes and security security updates" alert, though.
The updates fix a certificate validation issue, coupled improved checks for the three updates. All told, CVE-2023-41991, and CVE-2023-41992, plus a WebKit bug were addressed again with the patch.
The iOS 17.0.1 and iPadOS 17.0.1 updates are both build number 21A340. The watchOS 10.0.1 update holds build number 21R360. A special iOS 17.0.2 build is also available for the iPhone 15 models, with build number 21A350.
Both are very small increments from the initial releases from Monday.