CVE-2021-30991

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 15.2 and iPadOS 15.2. A malicious 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

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-2021-309925.5This issue was addressed with improved handling of file metadata. This issue is fixed in iOS 15.2 and iPadOS 15.2. A user in a FaceTime callCVE-2021-309938.1A buffer overflow issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.1, watchOS 8.3, iOS 15.2 and iCVE-2021-309943.3An access issue was addressed with improved access restrictions. This issue is fixed in macOS Monterey 12.0.1. A malicious application may bCVE-2021-309957.0A race condition was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, SeCVE-2021-309967.0A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.1, iOS 15.2 and iPadOS 15.2. A malicioCVE-2021-309977.5A S/MIME issue existed in the handling of encrypted email. This issue was addressed by not automatically loading some MIME parts. This issueCVE-2021-309985.3A S/MIME issue existed in the handling of encrypted email. This issue was addressed with improved selection of the encryption certificate. TCVE-2021-309994.3The issue was addressed with improved permissions logic. This issue is fixed in iOS 14.6 and iPadOS 14.6. A user may be unable to fully deleCVE-2021-31008.8The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowinCVE-2021-310003.3A permissions issue was addressed with improved validation. This issue is fixed in iOS 15.2 and iPadOS 15.2, watchOS 8.3, macOS Monterey 12.CVE-2021-310016.5An access issue was addressed with improved access restrictions. This issue is fixed in iOS 15 and iPadOS 15. An attacker in a privileged neCVE-2021-310027.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.2. A ma
CVE-2021-30991: High severity, CVSS 7.8 | Vulnix