---
id: CVE-2026-86944
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 26.7 and iPadOS 26.7, macOS Sequoia 15.8, macOS Tahoe
  26.7. An app may be able to cause unexpected system termination.
severity: none
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 26.7
  - macOS < 15.8
  - macOS < 26.7
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T00:50:53.850Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-86944'
references:
  - url: 'https://support.apple.com/en-us/149041'
  - url: 'https://support.apple.com/en-us/149042'
  - url: 'https://support.apple.com/en-us/149043'
tags:
  - cve.org
ingestedAt: '2026-10-20T01:49:42.589Z'
---

## Overview

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

## Affected

- `ios_and_ipados < 26.7`
- `macOS < 15.8`
- `macOS < 26.7`

## Remediation

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