CVE-2020-9947

A use after free issue was addressed with improved memory management. This issue is fixed in watchOS 7.0, iOS 14.0 and iPadOS 14.0, iTunes for Windows 12.10.9, iCloud for Windows 11.5, tvOS 14.0, Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.

• CWE-416

• http://www.openwall.com/lists/oss-security/2021/03/22/1Mailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202104-03Third Party Advisory
• https://support.apple.com/en-us/HT211843Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211844Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211845Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211850Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211935Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211952Release Notes, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2021/03/22/1Mailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202104-03Third Party Advisory
• https://support.apple.com/en-us/HT211843Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211844Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211845Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211850Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211935Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT211952Release Notes, Vendor Advisory

Published

Dec 8, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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• CVE-2020-9941This issue was addressed with improved checks. This issue is…7.5
• CVE-2020-9942An inconsistent user interface issue was addressed with impr…4.3
• CVE-2020-9943An out-of-bounds read was addressed with improved bounds che…5.5
• CVE-2020-9944An out-of-bounds read was addressed with improved bounds che…5.5
• CVE-2020-9945A spoofing issue existed in the handling of URLs. This issue…4.3
• CVE-2020-9946This issue was addressed with improved checks. This issue is…6.8
• CVE-2020-9948A type confusion issue was addressed with improved memory ha…8.8
• CVE-2020-9949A use after free issue was addressed with improved memory ma…7.8
• CVE-2020-9950A use after free issue was addressed with improved memory ma…8.8
• CVE-2020-9951A use after free issue was addressed with improved memory ma…8.8
• CVE-2020-9952An input validation issue was addressed with improved input …7.1
• CVE-2020-9954A buffer overflow issue was addressed with improved memory h…7.8