CVE-2021-30927

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. An application may be able to execute arbitrary code with kernel privileges.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published
Aug 24, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-309287.8A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.6, watchOS 8, tvOS 15, iOS 1CVE-2021-309295.5An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, iOS 15.2 and iPadOS 15CVE-2021-309305.3A logic issue was addressed with improved state management. This issue is fixed in macOS Monterey 12.0.1. An attacker may be able to track uCVE-2021-309315.5A logic issue was addressed with improved validation. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.2, Security Update 20CVE-2021-309324.6The issue was addressed with improved permissions logic. This issue is fixed in iOS 15.2 and iPadOS 15.2. A person with physical access to aCVE-2021-309337.0A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6. A malicious aCVE-2021-309348.8A buffer overflow issue was addressed with improved memory handling. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOSCVE-2021-309358.8A logic issue was addressed with improved validation. This issue is fixed in Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. An appCVE-2021-309368.8A use after free issue was addressed with improved memory management. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOCVE-2021-309377.8A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS MontereCVE-2021-309387.7This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur CVE-2021-309397.8An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12
CVE-2021-30927: High severity, CVSS 7.8 | Vulnix