CVE-2021-30807

State: Published
Severity: 7.8 High
Published: Oct 19, 2021
Updated: Oct 21, 2025
Reserved: Apr 13, 2021

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
macOSApple	before 11.5Affected
macOSApple	before 14.7Affected
macOSApple	before 7.6Affected

References

https://support.apple.com/en-us/HT212622
https://support.apple.com/en-us/HT212623
https://support.apple.com/en-us/HT212713
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30807government-resource

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