CVE-2026-64776

Analyzed Analyzed - Analysis Complete

Improper Input Validation in macOS Kernel

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

The issue was addressed with improved bounds checks. 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 disclose kernel memory.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-27

Last Modified

2026-07-28

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-64776

EUVD

EUVD-2026-49458

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)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability involves an issue where an app could potentially access and disclose kernel memory due to insufficient bounds checks. It was addressed by implementing improved bounds checks in the affected macOS versions.

Detection Guidance

Detection requires verifying if your macOS version is affected. Check your system version with 'sw_vers' command. Compare it against the fixed versions: macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6. If your version is older, your system is vulnerable.

Impact Analysis

An attacker could exploit this flaw to read sensitive kernel memory, potentially leading to unauthorized access to system data or escalation of privileges on the affected macOS system.

Compliance Impact

The provided CVE does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves potential kernel memory disclosure, which could theoretically expose sensitive data if exploited. However, no explicit compliance implications are mentioned in the given context.

Mitigation Strategies

Update your macOS to the latest version immediately. Go to System Settings > General > Software Update and install the available updates. This will patch the kernel memory disclosure issue.

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