---
id: CVE-2026-86981
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 macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to
  cause unexpected system termination.
severity: none
vendor: Apple
product: macOS
affected:
  - macOS < 15.8
  - macOS < 26.7
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T00:50:57.929Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-86981'
references:
  - url: 'https://support.apple.com/en-us/149042'
  - url: 'https://support.apple.com/en-us/149043'
tags:
  - cve.org
ingestedAt: '2026-10-20T01:49:42.585Z'
---

## Overview

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

## Affected

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

## Remediation

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