A vulnerability, CVE-2022-22620, has been found on iOS devices. Users of iOS, iPadOS, and macOS devices are advised to apply the latest operating system patches immediately. The vulnerability affects all web browsers and apps that use web browsing in the background. It allows Apple devices to be instantly infected with malware by visiting a web page or viewing a malicious advertisement on a safe website.
See Apple Support for the patch. https://support.apple.com/en-us/HT213093