A use after free issue was addressed with improved memory management. This issue is fixed in Safari 16.2, tvOS 16.2, macOS Ventura 13.1, iOS 16.2 and iPadOS 16.2, watchOS 9.2. Processing maliciously crafted web content may lead to arbitrary code execution.
https://support.apple.com/en-us/HT213537
https://support.apple.com/en-us/HT213535
https://support.apple.com/en-us/HT213532
https://support.apple.com/en-us/HT213536
https://support.apple.com/en-us/HT213530
https://security.gentoo.org/glsa/202305-32
http://www.openwall.com/lists/oss-security/2022/12/26/1
http://seclists.org/fulldisclosure/2022/Dec/28
http://seclists.org/fulldisclosure/2022/Dec/27
http://seclists.org/fulldisclosure/2022/Dec/26