CVE-2021-30842

This issue was addressed with improved checks. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, Security Update 2021-005 Catalina, tvOS 15, iOS 15 and iPadOS 15, watchOS 8. Processing a maliciously crafted dfont file may lead to arbitrary code execution.

• http://seclists.org/fulldisclosure/2021/Oct/61Mailing List, Release Notes, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/Oct/62Mailing List, Release Notes, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/Oct/63Mailing List, Release Notes, Third Party Advisory
• https://support.apple.com/en-us/HT212804Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212805Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212807Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212814Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212815Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212819Release Notes, Vendor Advisory
• http://seclists.org/fulldisclosure/2021/Oct/61Mailing List, Release Notes, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/Oct/62Mailing List, Release Notes, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/Oct/63Mailing List, Release Notes, Third Party Advisory
• https://support.apple.com/en-us/HT212804Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212805Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212807Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212814Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212815Release Notes, Vendor Advisory
• https://support.apple.com/en-us/HT212819Release Notes, Vendor Advisory

Published

Oct 19, 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.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

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• CVE-2021-30841This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-30843This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-30844A logic issue was addressed with improved state management. …7.5
• CVE-2021-30845An out-of-bounds read was addressed with improved bounds che…5.5
• CVE-2021-30846A memory corruption issue was addressed with improved memory…7.8
• CVE-2021-30847This issue was addressed with improved checks. This issue is…7.8
• CVE-2021-30848A memory corruption issue was addressed with improved memory…7.8