The iOS 11.2.2 update can be downloaded for free on all eligible devices over-the-air in the Settings app. To access the update, go to Settings --> General --> Software Update.
The iOS 11.2.2 includes further fixes for the "Meltdown" and "Spectre" vulnerabilities that came to light last week. Meltdown and Spectre are serious hardware-based vulnerabilities that take advantage of the speculative execution mechanism of a CPU, allowing hackers to gain access to sensitive information.
While Meltdown was addressed in the iOS 11.2 update, Apple said it would introduce a mitigation for Spectre early this week. There is no hardware fix for Spectre, so Apple is addressing the vulnerability using Safari-based software workarounds. From Apple's security support document:
Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generationFor more on iOS 11 and its updates, make sure to check out our iOS 11 roundup.
Description: iOS 11.2.2 includes security improvements to Safari and WebKit to mitigate the effects of Spectre (CVE-2017-5753 and CVE-2017-5715).
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