Out-of-Bounds Write Vulnerability in Apple Operating Systems
CVE-2026-84523

5.5MEDIUM

Key Information:

Vendor

Apple
Status
iOS And iPad OS
Mac OS
TV OS
Visionos
Vendor
CVE Published:
14 September 2026

What is CVE-2026-84523?

An out-of-bounds write issue in various Apple operating systems could allow apps to bypass intended memory access limits. This vulnerability poses risks including unexpected system termination or unintentional modifications to kernel memory, potentially compromising system integrity and security. The issue has been addressed in recent updates across iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, enhancing their resilience against such threats.

Affected Version(s)

iOS and iPadOS 0 < 26.7

iOS and iPadOS 0 < 27

macOS 0 < 15.8

References

https://support.apple.com/en-us/149034
https://support.apple.com/en-us/149035
https://support.apple.com/en-us/149036

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.