CVE-2021-1791

An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to disclose kernel memory.

• CWE-125

• https://support.apple.com/en-us/HT212146Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212147Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212148Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212149Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212146Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212147Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212148Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212149Release Notes, Vendor 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.
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• CVE-2021-1793This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-1794An out-of-bounds read was addressed with improved input vali…9.8
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