---
id: CVE-2026-84558
title: A double free issue was addressed with improved memory management
summary: >-
  A double free issue was addressed with improved memory management. This issue
  is fixed in macOS Golden Gate 27. An app may be able to cause unexpected
  system termination.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-415
vendor: apple
product: macos
affected:
  - macos < 27.0
patched:
  - macos 27.0
published: '2026-09-14'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:16:49.670'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84558'
references:
  - url: 'https://support.apple.com/en-us/149035'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-17T16:51:41.969273Z'
epss: 0.00153
epssPercentile: 0.03689
ingestedAt: '2026-09-14T21:15:17.488Z'
---

## Overview

A double free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27. An app may be able to cause unexpected system termination.

## Affected

- `macos < 27.0`

## Remediation

Upgrade past the affected range:

- `macos 27.0`