CVE-2021-30857: Apple iPadOS

High severity, CVSS 7.0. EPSS: 0.9% chance of exploitation in the next 30 days.

A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.

Affected products

• Apple iPadOS: before 15.0 (fixed in 15.0)
• Apple iPhone OS: before 15.0 (fixed in 15.0)
• Apple Mac OS X: before 10.15.7 (fixed in 10.15.7); version 10.15.7 only
• Apple macOS: from 11.0, before 11.6 (fixed in 11.6)
• Apple tvOS: before 15.0 (fixed in 15.0)
• Apple watchOS: before 8.0 (fixed in 8.0)

Published 2021-08-24. Last modified 2026-06-17.