Apple has issued its iOS 16.3.1 software update.
The update provides important bug and security fixes for the iPhone – including one flaw that has already been used by bad actors.
On its website, the tech giant wrote that WebKit was impacted: a browser engine that is primarily used in Apple's Safari web browser.
"Processing maliciously crafted web content may lead to arbitrary code execution," Apple said. "Apple is aware of a report that this issue may have been actively exploited."
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"A type confusion issue was addressed with improved checks," Apple said of the latest security update.
The update is available for iPhone 8 model and later, all models of the iPad Pro, the third-generation iPad Air and later, the fifth-generation iPad Air and later and the fifth-generation iPad mini and later.
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It also addresses another security issue in the iPhone's Kernel framework.
"An app may be able to execute arbitrary code with kernel privileges," Apple explained.
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The iOS 16.3.1 update comes just weeks after the release of iOS 16.3.