The issue was addressed with improved memory handling. This issue is fixed in Safari 17.3, iOS 16.7.5 and iPadOS 16.7.5, iOS 17.3 and iPadOS 17.3, macOS Sonoma 14.3, tvOS 17.3, watchOS 10.3. Processing web content may lead to arbitrary code execution.
http://seclists.org/fulldisclosure/2024/Jan/40
http://seclists.org/fulldisclosure/2024/Jan/39
http://seclists.org/fulldisclosure/2024/Jan/36
http://seclists.org/fulldisclosure/2024/Jan/34
https://support.apple.com/kb/HT214063
https://support.apple.com/kb/HT214061
https://support.apple.com/kb/HT214060
https://support.apple.com/kb/HT214059
https://support.apple.com/kb/HT214056
https://support.apple.com/kb/HT214055
https://support.apple.com/en-us/HT214063
https://support.apple.com/en-us/HT214061
https://support.apple.com/en-us/HT214060
https://support.apple.com/en-us/HT214059
https://support.apple.com/en-us/HT214056
https://support.apple.com/en-us/HT214055
https://support.apple.com/en-us/120339
https://support.apple.com/en-us/120311
https://support.apple.com/en-us/120310
https://support.apple.com/en-us/120309
https://support.apple.com/en-us/120306