---
id: CVE-2026-84575
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, macOS Sequoia
  15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. Processing a
  maliciously…
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-787
vendor: apple
product: ipados
affected:
  - ipados < 27.0
  - iphone_os < 27.0
  - 'macos >= 15.0, < 15.8'
  - 'macos >= 26.0, < 26.7'
  - tvos < 27.0
  - visionos < 27.0
  - watchos < 27.0
patched:
  - ipados 27.0
  - iphone_os 27.0
  - macos 26.7
  - tvos 27.0
  - visionos 27.0
  - watchos 27.0
published: '2026-09-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T01:06:34.923'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84575'
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
  - url: 'https://support.apple.com/en-us/149042'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149043'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
epss: 0.00171
epssPercentile: 0.05848
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-15T17:50:43.434325Z'
ingestedAt: '2026-09-14T21:15:17.467Z'
---

## 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, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. Processing a maliciously crafted file may lead to unexpected app termination.

## Affected

- `ipados < 27.0`
- `iphone_os < 27.0`
- `macos >= 15.0, < 15.8`
- `macos >= 26.0, < 26.7`
- `tvos < 27.0`
- `visionos < 27.0`
- `watchos < 27.0`

## Remediation

Upgrade past the affected range:

- `ipados 27.0`
- `iphone_os 27.0`
- `macos 26.7`
- `tvos 27.0`
- `visionos 27.0`
- `watchos 27.0`