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Update, Feb. 12, 2025: This story, originally published Feb 11., now includes additional expert analysis on the flaw fixed iOS 18.3.1, other updates issued alongside it, and information on an Apple Intelligence bug that may have been introduced.
Apple has released iOS 18.3.1, along with a warning to update your iPhone now. That’s because iOS 18.3.1 is an emergency patch that fixes a single security issue that’s already being used in real-life attacks.