Apple announced Thursday that owners of its mobile devices will require yet another operating system update.

The latest versions are iOS and iPadOS version 17.1.2. Owners of at least iPhone XS and various iPads going back to first and second generations – especially those running older OS versions — should update immediately.

The issue has to do with two vulnerabilities found in Apple’s WebKit, its engine for consuming various online content, and requiring better input validation and memory corruption, hence the update. The two were found by security researcher Clément Lecigne of Google’s Threat Analysis Group

This comes on the heels of 18 other Apple-related zero-day, or unpatched, vulnerabilities that have been discovered since the beginning of 2023, as documented by Bleeping Computer. Some of these are rather esoteric, such as ways to avoid being compromised by the Predator spyware that targets specific high-risk users.

Mac users running macOS versions Monterey, Ventura and Sonoma should also check for any updates of both their OS and any browsers.

Google announced on Tuesday updates to its Chrome browser for Mac, Linux and Windows users to cover other browser problems, some of which it has observed in the wild.

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