By renaming a HomeKit compatible device to more than 500,000 characters, this flaw permitted a malicious user to crash and freeze an iPhone or iPad repeatedly. iOS has backed up HomeKit device names to iCloud, which might lead to an eternal crash loop for iOS users. READ MORE - https://www.thenexthint.com/apple-launches-ios-15-2-1-to-fix-a-genuine-homekit-ddos-issue/12504/