---
id: CVE-2026-86903
title: An out-of-bounds read was addressed with improved input validation
summary: >-
  An out-of-bounds read was addressed with improved input validation. 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 disclose kernel memory.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-125
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: '2026-09-16'
sourceUpdated: '2026-09-16T01:02:03.510'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86903'
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
epss: 0.00158
epssPercentile: 0.04202
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T15:22:26.009169Z'
ingestedAt: '2026-09-14T21:15:17.498Z'
---

## Overview

An out-of-bounds read was addressed with improved input validation. 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 disclose 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`