---
id: CVE-2026-64767
title: A buffer overflow was addressed with improved bounds checking
summary: >-
  A buffer overflow was addressed with improved bounds checking. This issue is
  fixed in macOS Sequoia 15.7.8, macOS Sequoia 15.8.2, macOS Sonoma 14.8.8,
  macOS Tahoe 26.6. A remote attacker may be able to cause unexpected system
  termination…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: adp
vendor: Apple
product: macOS
affected:
  - macOS < 14.8.8
  - macOS < 15.7.8
  - macOS < 15.8.2
  - macOS < 26.6
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-07-28T14:02:03.579422Z'
published: '2026-07-27'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:40:00.552Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64767'
references:
  - url: 'https://support.apple.com/en-us/128067'
  - url: 'https://support.apple.com/en-us/128071'
  - url: 'https://support.apple.com/en-us/128072'
  - url: 'https://support.apple.com/en-us/149523'
tags:
  - cve.org
epss: 0.00895
epssPercentile: 0.59326
ingestedAt: '2026-10-27T16:11:58.980Z'
---

## Overview

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sequoia 15.8.2, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

## Affected

- `macOS < 14.8.8`
- `macOS < 15.7.8`
- `macOS < 15.8.2`
- `macOS < 26.6`

## Remediation

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