CVE-2026-64694

Analyzed Analyzed - Analysis Complete

Integer Overflow in macOS Leading to System Termination

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

An integer overflow was addressed with improved input validation. 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 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-2026-64694

EUVD

EUVD-2026-49493

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-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow caused by insufficient input validation. It allows an application to trigger unexpected system termination by exploiting improper handling of large numerical values.

Detection Guidance

This vulnerability is specific to Apple macOS versions and involves an integer overflow issue. Detection primarily involves checking your macOS version against the patched releases. Use the command 'sw_vers' to check your current macOS version. If your version is below macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6, your system is vulnerable.

Impact Analysis

An attacker could exploit this to crash your system unexpectedly. This may lead to data loss or disrupt critical operations if the crash occurs during important tasks.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it only causes unexpected system termination without evidence of data exposure or unauthorized access. Compliance impact would depend on specific implementation and incident response measures.

Mitigation Strategies

Update to the latest patched versions of macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6 to address the integer overflow issue.

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