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Patching guidance for Apple devices – December 13, 2021
https://support.apple.com/en-us/HT201222
As you can see by the release notes there are a LOT of security fixes in these releases
iOS 15.2 security content addresses 38 vulns.
8: out-of-bounds access
7: buffer overflow
5: input validation
4: race condition
4: logic issues
3: memory corruption
3: state machine
2: use after free
1: type confusion
1: misc permission issueSame sort of Askwoody patching rules apply: Home user, you can wait a bit to ensure there are no side effects.
Business user – especially someone who might be targeted (work for defense, big business etc) you’ll want this sooner not later