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Related Vulnerabilities: CVE-2021-30858

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

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The MITRE CVE dictionary describes this issue as:

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Additional Information

Bugzilla 2006099: CVE-2021-30858 webkitgtk: Maliciously crafted web content may lead to arbitrary code execution
CWE-416: Use After Free
FAQ: Frequently asked questions about CVE-2021-30858

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CVE-2021-30858

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