CVE-2026-64747

Analyzed Analyzed - Analysis Complete

Buffer Overflow in Apple iOS and macOS

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

A buffer overflow was addressed with improved size validation. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to execute arbitrary code with kernel privileges.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-27

Last Modified

2026-07-29

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-64747

EUVD

EUVD-2026-49539

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 14.0 (inc) to 14.8.8 (exc)
apple	macos	From 15.0 (inc) to 15.7.8 (exc)
apple	macos	From 26.0 (inc) to 26.6 (exc)
apple	ipados	to 26.6 (exc)
apple	iphone_os	to 26.6 (exc)
apple	tvos	to 26.6 (exc)
apple	visionos	to 26.6 (exc)
apple	watchos	to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-120	The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Attack-Flow Graph

Executive Summary

This is a buffer overflow vulnerability caused by insufficient size validation. It allows an attacker to execute arbitrary code with kernel privileges on affected Apple devices. The issue was fixed in specific versions of iOS, iPadOS, macOS, tvOS, visionOS, and watchOS.

Detection Guidance

Detection requires checking if your device is running a vulnerable version of Apple's operating systems. Compare your installed versions against the fixed versions: iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, or watchOS 26.6. Use system update commands like 'softwareupdate --list' on macOS or 'Settings > General > Software Update' on iOS.

Impact Analysis

An attacker could exploit this to gain full control over your device, steal sensitive data, install malware, or disrupt operations. It poses a high risk as it allows kernel-level access, which is the most privileged level on a system.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face compliance breaches if exploited.

Mitigation Strategies

Immediately update all affected Apple devices to the latest versions listed: iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, or watchOS 26.6. Enable automatic updates if not already active to prevent future vulnerabilities.

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