---
id: CVE-2026-84496
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 Golden Gate 27.2, macOS Tahoe 26.7.2. Mounting a
  maliciously crafted disk image may cause unexpected system termination or
  corrupt ker…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: adp
vendor: Apple
product: macOS
affected:
  - macOS < 26.7.2
  - macOS < 27.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-27T00:04:15.110570Z'
published: '2026-10-26'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T00:10:49.673Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-84496'
references:
  - url: 'https://support.apple.com/en-us/149521'
  - url: 'https://support.apple.com/en-us/149522'
tags:
  - cve.org
epss: 0.00462
epssPercentile: 0.39874
ingestedAt: '2026-10-27T16:11:59.174Z'
---

## Overview

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2, macOS Tahoe 26.7.2. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

## Affected

- `macOS < 26.7.2`
- `macOS < 27.2`

## Remediation

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