A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.
seclists.org/fulldisclosure/2020/Nov/18
seclists.org/fulldisclosure/2020/Nov/19
seclists.org/fulldisclosure/2020/Nov/20
seclists.org/fulldisclosure/2020/Nov/22
www.openwall.com/lists/oss-security/2020/11/23/3
security.gentoo.org/glsa/202012-10
support.apple.com/HT211845
support.apple.com/kb/HT211843
support.apple.com/kb/HT211844
support.apple.com/kb/HT211850
support.apple.com/kb/HT211935
support.apple.com/kb/HT211952
www.debian.org/security/2020/dsa-4797