CVE-2021-30983: Apple iOS and iPadOS Buffer Overflow Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2022-06-27. EPSS: 2.9% chance of exploitation in the next 30 days.

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

Affected products

• Apple iPadOS: before 15.2 (fixed in 15.2)
• Apple iPhone OS: before 15.2 (fixed in 15.2)

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