CVE-2026-43769

Undergoing Analysis Undergoing Analysis - In Progress

Integer Overflow in Apple iOS and macOS Systems

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-27

Last Modified

2026-07-29

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-43769

EUVD

EUVD-2026-49517

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)
apple	ipados	to 26.6 (exc)
apple	iphone_os	to 26.6 (exc)
apple	tvos	to 26.6 (exc)
apple	visionos	to 26.6 (exc)
apple	watchos	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 app to trigger unexpected system termination by exploiting improper handling of large numerical values.

Detection Guidance

This vulnerability is specific to Apple operating systems and requires checking installed versions against patched releases. For iOS/iPadOS, macOS, tvOS, visionOS, and watchOS, verify if your system version is below the fixed releases (e.g., iOS 26.6, macOS Sequoia 15.7.8). No direct network detection commands are provided in the context.

Impact Analysis

An attacker could craft an app that exploits this flaw to crash your device unexpectedly. This may lead to data loss or disrupt normal device operations if the system terminates improperly.

Compliance Impact

The vulnerability is an integer overflow issue that could cause unexpected system termination. This does not directly impact compliance with GDPR, HIPAA, or similar standards as it does not involve data exposure or unauthorized access.

Mitigation Strategies

Update affected Apple devices to the latest versions: iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, or watchOS 26.6.

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