High severity7.8NVD Advisory· Published Mar 18, 2022· Updated Jun 17, 2026
CVE-2021-30771
CVE-2021-30771
Description
An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.4, iOS 14.6 and iPadOS 14.6, watchOS 7.5, tvOS 14.6. Processing a maliciously crafted font file may lead to arbitrary code execution.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7- Range: = 11.4
- Range: = 14.6
- Range: = 14.6
- Range: unspecified
- Range: unspecified
- Range: unspecified
- Range: unspecified
Patches
Vulnerability mechanics
References
4- support.apple.com/en-us/HT212528nvdVendor Advisory
- support.apple.com/en-us/HT212529nvdVendor Advisory
- support.apple.com/en-us/HT212532nvdVendor Advisory
- support.apple.com/en-us/HT212533nvdVendor Advisory
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