High severity7.5NVD Advisory· Published Sep 8, 2021· Updated Jun 17, 2026

CVE-2021-30660

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. A malicious application may be able to disclose kernel memory.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Apple Inc./tvOSllm-fuzzy2 versions
= 14.5+ 1 more
- (no CPE)range: = 14.5
- (no CPE)range: unspecified
Apple Inc./macOSllm-fuzzy2 versions
= 11.3+ 1 more
- (no CPE)range: = 11.3
- (no CPE)range: unspecified
Apple Inc./Ipadosllm-fuzzy
Range: = 14.5
Apple Inc./watchOSllm-fuzzy2 versions
= 7.4+ 1 more
- (no CPE)range: = 7.4
- (no CPE)range: unspecified
Apple Inc./iOSllm-fuzzy
Range: = 14.5
Apple Inc./iOS and iPadOScpe-rescue
Range: unspecified

Patches

Vulnerability mechanics

References

support.apple.com/en-us/HT212317nvdVendor Advisory
support.apple.com/en-us/HT212323nvdVendor Advisory
support.apple.com/en-us/HT212324nvdVendor Advisory
support.apple.com/en-us/HT212325nvdVendor Advisory

News mentions

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cvss	0.488
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000