A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 14.2 and iPadOS 14.2, iCloud for Windows 11.5, Safari 14.0.1, tvOS 14.2, iTunes 12.11 for Windows. Processing maliciously crafted web content may lead to arbitrary code execution.
https://support.apple.com/en-us/HT211929
https://support.apple.com/en-us/HT211928
https://support.apple.com/en-us/HT211935
https://support.apple.com/en-us/HT211931
https://support.apple.com/en-us/HT211934
https://support.apple.com/en-us/HT211933
https://support.apple.com/en-us/HT211930
http://seclists.org/fulldisclosure/2020/Dec/32
http://www.openwall.com/lists/oss-security/2021/03/22/1
Source: MITRE
Published: 2020-12-08
Updated: 2021-05-01
Type: CWE-416
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 7.8
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH