CVE-2026-64703

Received Received - Intake

Memory Corruption Flaw in macOS Sequoia

Publication date: 2026-07-27

Last updated on: 2026-07-27

Assigner: Apple Inc.

Description

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause a denial-of-service.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-27

Last Modified

2026-07-27

Generated

2026-07-28

AI Q&A

2026-07-28

EPSS Evaluated

N/A

NVD

CVE-2026-64703

EUVD

EUVD-2026-49467

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos_sequoia	to 15.7.8 (inc)
apple	macos_sonoma	to 14.8.8 (inc)
apple	macos_tahoe	to 26.6 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability caused by improper memory management. An application may free memory but continue to use it, leading to crashes or denial-of-service conditions.

Detection Guidance

This vulnerability is specific to Apple macOS versions and involves a use-after-free issue. Detection primarily involves checking your macOS version against the patched releases. Use the command 'sw_vers' to check your macOS version. If your version is below Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6, your system is vulnerable.

Impact Analysis

An attacker could exploit this to crash an application or system, causing a denial-of-service where the device becomes unresponsive or requires a restart.

Mitigation Strategies

Immediately update your macOS to the latest patched version: Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6. You can update via System Preferences > Software Update. Ensure automatic updates are enabled to prevent future vulnerabilities.

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