Input Validation Flaw in Apple Products Leading to System Instability
CVE-2026-39868

9.1CRITICAL

Key Information:

Vendor

Apple
Status
iOS And iPad OS
Mac OS
Vendor
CVE Published:
29 June 2026

What is CVE-2026-39868?

An input validation flaw in Apple's operating systems can permit malicious applications to cause unexpected system terminations or to corrupt kernel memory, leading to potential system instability. Apple has addressed this vulnerability with improved input validation methods in the latest updates for iOS, iPadOS, and macOS Tahoe.

Affected Version(s)

iOS and iPadOS 0 < 26.5.2

macOS 0 < 26.5.2

References

https://support.apple.com/en-us/127594
https://support.apple.com/en-us/127595

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.