---
id: CVE-2026-64736
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 26.6.1 and iPadOS 26.6.1, macOS Sequoia 15.8, macOS
  Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. An app may be able to cause
  unexpec…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-125
  - CWE-787
vendor: apple
product: ipados
affected:
  - ipados < 26.6.1
  - iphone_os < 26.6.1
  - 'macos >= 15.0, < 15.8'
  - 'macos >= 26.0, < 26.6.2'
  - tvos < 27.0
  - visionos < 27.0
  - watchos < 27.0
patched:
  - ipados 26.6.1
  - iphone_os 26.6.1
  - macos 26.6.2
  - tvos 27.0
  - visionos 27.0
  - watchos 27.0
published: '2026-09-14'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T19:30:41.410'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64736'
references:
  - url: 'https://support.apple.com/en-us/148281'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/148282'
    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
  - url: 'https://support.apple.com/en-us/149043'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
epss: 0.00162
epssPercentile: 0.04788
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T15:25:00.602494Z'
ingestedAt: '2026-09-14T21:15:17.484Z'
---

## Overview

An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Sequoia 15.8, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. An app may be able to cause unexpected system termination or corrupt kernel memory.

## Affected

- `ipados < 26.6.1`
- `iphone_os < 26.6.1`
- `macos >= 15.0, < 15.8`
- `macos >= 26.0, < 26.6.2`
- `tvos < 27.0`
- `visionos < 27.0`
- `watchos < 27.0`

## Remediation

Upgrade past the affected range:

- `ipados 26.6.1`
- `iphone_os 26.6.1`
- `macos 26.6.2`
- `tvos 27.0`
- `visionos 27.0`
- `watchos 27.0`