CVE-2026-64767

Analyzed Analyzed - Analysis Complete

Buffer Overflow in macOS Kernel

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause unexpected system termination or corrupt 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-2026-64767

EUVD

EUVD-2026-49551

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-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 bounds checking. A remote attacker could exploit it to cause unexpected system termination or corrupt kernel memory by sending specially crafted input.

Detection Guidance

Detection requires checking the macOS version against the patched releases. Use 'sw_vers' to check your current macOS version. Compare it with Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6. If your version is older, the system is vulnerable.

Impact Analysis

An attacker could crash your system or corrupt kernel memory, potentially leading to data loss, unauthorized access, or denial of service. Systems running vulnerable macOS versions are at risk.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a buffer overflow that could cause system termination or kernel memory corruption, but no compliance-related effects are mentioned.

Mitigation Strategies

Update to the latest patched version of macOS immediately. Go to System Settings > General > Software Update and install the latest available update. If automatic updates are disabled, enable them to prevent future vulnerabilities.

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