CVE-2020-9967

Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, tvOS 14.0, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.0, iOS 14.0 and iPadOS 14.0. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

• CWE-787

• http://packetstormsecurity.com/files/163501/XNU-Network-Stack-Kernel-Heap-Overflow.htmlThird Party Advisory, VDB Entry
• https://support.apple.com/en-us/HT211843Vendor Advisory
• https://support.apple.com/en-us/HT211844Vendor Advisory
• https://support.apple.com/en-us/HT211850Vendor Advisory
• https://support.apple.com/en-us/HT211931Vendor Advisory
• https://support.apple.com/en-us/HT212011Vendor Advisory
• http://packetstormsecurity.com/files/163501/XNU-Network-Stack-Kernel-Heap-Overflow.htmlThird Party Advisory, VDB Entry
• https://support.apple.com/en-us/HT211843Vendor Advisory
• https://support.apple.com/en-us/HT211844Vendor Advisory
• https://support.apple.com/en-us/HT211850Vendor Advisory
• https://support.apple.com/en-us/HT211931Vendor Advisory
• https://support.apple.com/en-us/HT212011Vendor Advisory

Published

Apr 2, 2021

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.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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• CVE-2020-9966An out-of-bounds read was addressed with improved input vali…7.8
• CVE-2020-9968A logic issue was addressed with improved restrictions. This…5.5
• CVE-2020-9969An access issue was addressed with additional sandbox restri…5.5
• CVE-2020-9971A logic issue was addressed with improved validation. This i…7.8
• CVE-2020-9972A buffer overflow issue was addressed with improved memory h…7.8
• CVE-2020-9973An out-of-bounds read was addressed with improved bounds che…7.8
• CVE-2020-9974A logic issue was addressed with improved state management. …5.5