CVE-2021-30851: Apple iPadOS

High severity, CVSS 8.8. EPSS: 2.4% chance of exploitation in the next 30 days.

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 15, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code execution.

Affected products

• Apple iPadOS: before 15.0 (fixed in 15.0)
• Apple iPhone OS: before 15.0 (fixed in 15.0)
• Apple macOS: before 12.0.1 (fixed in 12.0.1); version 12.0.1 only
• Apple Safari: before 15.0 (fixed in 15.0)
• Apple tvOS: before 15.0 (fixed in 15.0)
• Apple watchOS: before 8.0 (fixed in 8.0)
• Debian Debian Linux: version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 33 only; version 34 only

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