---
id: CVE-2026-86918
title: An out-of-bounds write issue was addressed with improved bounds checking
summary: >-
  An out-of-bounds write issue was addressed with improved bounds checking. This
  issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27,
  visionOS 27, watchOS 27. Processing a maliciously crafted image may lead to
  unexpected …
severity: none
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 27
  - macOS < 27
  - tvOS < 27
  - visionOS < 27
  - watchOS < 27
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T00:50:51.428Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-86918'
references:
  - url: 'https://support.apple.com/en-us/149034'
  - url: 'https://support.apple.com/en-us/149035'
  - url: 'https://support.apple.com/en-us/149036'
  - url: 'https://support.apple.com/en-us/149037'
  - url: 'https://support.apple.com/en-us/149038'
tags:
  - cve.org
ingestedAt: '2026-10-20T01:49:42.593Z'
---

## Overview

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. Processing a maliciously crafted image may lead to unexpected app termination.

## Affected

- `ios_and_ipados < 27`
- `macOS < 27`
- `tvOS < 27`
- `visionOS < 27`
- `watchOS < 27`

## Remediation

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