CVE-2026-43764

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-2026-43764

EUVD

EUVD-2026-49495

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 an unexpected system termination by exploiting this flaw.

Detection Guidance

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

Impact Analysis

An attacker could exploit this to cause an app or system to crash unexpectedly. This may lead to data loss or denial of service if critical processes are terminated.

Compliance Impact

This vulnerability, an integer overflow leading to unexpected system termination, does not directly impact compliance with standards like GDPR or HIPAA as it primarily affects system stability rather than data confidentiality, integrity, or availability.

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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