The issue was addressed with improved memory handling. This issue is fixed in macOS Sonoma 14.4, visionOS 1.1, iOS 17.4 and iPadOS 17.4, watchOS 10.4, tvOS 17.4. Processing web content may lead to arbitrary code execution.
https://support.apple.com/en-us/HT214088
https://support.apple.com/en-us/HT214087
https://support.apple.com/en-us/HT214086
https://support.apple.com/en-us/HT214084
https://support.apple.com/en-us/HT214081
http://seclists.org/fulldisclosure/2024/Mar/26
http://seclists.org/fulldisclosure/2024/Mar/25