CVE-2026-64775

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Memory Initialization Issue in Apple iOS and macOS

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

A memory initialization issue was addressed with improved memory handling. 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 cause unexpected system termination.

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-2026-64775

EUVD

EUVD-2026-49610

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-665	The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

Attack-Flow Graph

Executive Summary

This is a memory initialization issue caused by improper memory handling. It allows an app to potentially cause unexpected system termination by exploiting uninitialized memory.

Detection Guidance

This vulnerability is specific to Apple operating systems and requires checking for outdated versions. Use system update commands like 'softwareupdate --list' on macOS or 'Settings > General > Software Update' on iOS/iPadOS to verify if your system is running a vulnerable version. If your version is below iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, or other specified versions, the system is vulnerable.

Impact Analysis

An attacker could exploit this to crash your device unexpectedly. This may lead to data loss or disrupt critical operations if the device is used for work or sensitive tasks.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability is described as a memory initialization issue causing unexpected system termination, which may not inherently relate to data protection or privacy requirements.

Mitigation Strategies

Update affected Apple devices to the latest 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 to address the memory initialization issue.

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