CVE-2026-64691

Analyzed Analyzed - Analysis Complete

Buffer Overflow in macOS Tahoe

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 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

2026-07-28

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-64691

EUVD

EUVD-2026-49453

Affected Vendors & Products

Vendor	Product	Version / Range
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 vulnerability is a buffer overflow issue in macOS Tahoe 26.6 caused by insufficient size validation. An attacker could exploit this to cause unexpected system termination by providing maliciously crafted input that exceeds expected buffer limits.

Detection Guidance

This vulnerability is specific to macOS Tahoe 26.6 and involves a buffer overflow issue. Detection would require checking the macOS version and monitoring for unexpected system terminations or crashes. No specific commands are provided in the context to detect this issue.

Impact Analysis

An attacker could exploit this to crash your system unexpectedly, leading to data loss or denial of service. It may also allow arbitrary code execution if combined with other vulnerabilities, potentially compromising your device.

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 in macOS Tahoe that could cause unexpected system termination, but no details are given about data exposure or regulatory implications.

Mitigation Strategies

Update to macOS Tahoe 26.6 or later to address the buffer overflow vulnerability. Enable automatic updates to ensure timely patches.

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