CVE-2026-28858: Apple iPadOS

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.4 and iPadOS 26.4. A remote user may be able to cause unexpected system termination or corrupt kernel memory.

Affected products

• Apple iPadOS: before 26.4 (fixed in 26.4)
• Apple iPhone OS: before 26.4 (fixed in 26.4)

Published 2026-03-25. Last modified 2026-06-17.