A use after free issue was addressed with improved memory management. This issue is fixed in Safari 17.2, iOS 17.2 and iPadOS 17.2, tvOS 17.2, watchOS 10.2, macOS Sonoma 14.2. Processing maliciously crafted web content may lead to arbitrary code execution.
https://support.apple.com/kb/HT214039
https://support.apple.com/en-us/HT214041
https://support.apple.com/en-us/HT214040
https://support.apple.com/en-us/HT214039
https://support.apple.com/en-us/HT214036