---
id: CVE-2026-65398
title: An out-of-bounds access issue was addressed with improved bounds checking
summary: >-
  An out-of-bounds access 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. An app may be able to cause unexpected system
  termination or …
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-120
vendor: apple
product: ipados
affected:
  - ipados < 27.0
  - iphone_os < 27.0
  - macos < 27.0
  - tvos < 27.0
  - visionos < 27.0
  - watchos < 27.0
patched:
  - ipados 27.0
  - iphone_os 27.0
  - macos 27.0
  - tvos 27.0
  - visionos 27.0
  - watchos 27.0
published: '2026-09-14'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T04:17:55.233'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65398'
references:
  - url: 'https://support.apple.com/en-us/149034'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149035'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149036'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149037'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149038'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T17:37:49.512103Z'
epss: 0.00131
epssPercentile: 0.03068
ingestedAt: '2026-09-14T21:15:17.507Z'
---

## Overview

An out-of-bounds access 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. An app may be able to cause unexpected system termination or corrupt kernel memory.

## Affected

- `ipados < 27.0`
- `iphone_os < 27.0`
- `macos < 27.0`
- `tvos < 27.0`
- `visionos < 27.0`
- `watchos < 27.0`

## Remediation

Upgrade past the affected range:

- `ipados 27.0`
- `iphone_os 27.0`
- `macos 27.0`
- `tvos 27.0`
- `visionos 27.0`
- `watchos 27.0`