---
id: CVE-2026-84634
title: A race condition was addressed with additional validation
summary: >-
  A race condition was addressed with additional validation. This issue is fixed
  in iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27. An app may be able
  to cause unexpected system termination or write kernel memory.
severity: none
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 27
  - macOS < 27
  - visionOS < 27
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:36:56.323Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-84634'
references:
  - url: 'https://support.apple.com/en-us/149034'
  - url: 'https://support.apple.com/en-us/149035'
  - url: 'https://support.apple.com/en-us/149038'
tags:
  - cve.org
epss: 0.00169
epssPercentile: 0.06257
ingestedAt: '2026-10-27T16:11:58.900Z'
---

## Overview

A race condition was addressed with additional validation. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27. An app may be able to cause unexpected system termination or write kernel memory.

## Affected

- `ios_and_ipados < 27`
- `macOS < 27`
- `visionOS < 27`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.