CVE-2026-28991

Received Received - Intake

Out-of-Bounds Read in Apple iOS and macOS

Publication date: 2026-05-11

Last updated on: 2026-05-11

Assigner: Apple Inc.

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to cause a denial-of-service.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-11

Last Modified

2026-05-11

Generated

2026-07-11

AI Q&A

2026-05-12

EPSS Evaluated

2026-07-10

NVD

CVE-2026-28991

Affected Vendors & Products

Vendor	Product	Version / Range
apple	ios	26.5
apple	ipad_os	26.5
apple	macos_tahoe	26.5
apple	tv_os	26.5
apple	vision_os	26.5
apple	watch_os	26.5

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read issue that was addressed by improving bounds checking in affected Apple operating systems. Essentially, it means that an application could read memory outside the intended boundaries, which can lead to unexpected behavior.

The issue has been fixed in iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5.

Impact Analysis

An application may be able to cause a denial-of-service (DoS) condition due to this vulnerability. This means that an app could crash or become unresponsive, potentially disrupting normal device operation.

Mitigation Strategies

To mitigate this vulnerability, update your Apple devices to the fixed versions of the operating systems: iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5.

Applying these updates will address the out-of-bounds read issue by improving bounds checking and prevent potential denial-of-service attacks caused by this vulnerability.

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