CVE-2026-86918

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Write in iOS and iPadOS

Publication date: 2026-10-20

Last updated on: 2026-11-09

Assigner: Apple Inc.

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. Processing a maliciously crafted image may lead to unexpected app termination.

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Meta Information

Published

2026-10-20

Last Modified

2026-11-09

Generated

2026-11-09

AI Q&A

2026-10-20

EPSS Evaluated

2026-11-08

NVD

CVE-2026-86918

EUVD

EUVD-2026-104718

Affected Vendors & Products

Vendor	Product	Version / Range
apple	ipados	to 27.0 (exc)
apple	iphone_os	to 27.0 (exc)
apple	macos	to 27.0 (exc)
apple	visionos	to 27.0 (exc)
apple	watchos	to 27.0 (exc)
apple	tvos	to 27.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds write vulnerability caused by insufficient bounds checking when processing images. A maliciously crafted image could trigger unexpected app termination by writing data outside allocated memory regions.

Detection Guidance

This vulnerability involves processing maliciously crafted images leading to app termination. Detection requires checking system and app logs for crashes or unexpected terminations after image processing. Monitor for iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, or watchOS 27 updates to identify affected versions.

Impact Analysis

If exploited, this flaw could cause apps to crash unexpectedly when processing malicious images. It may also allow attackers to execute arbitrary code on affected devices, potentially leading to data theft or further compromise.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The issue involves an out-of-bounds write that could cause app termination when processing malicious images, but no details are given about data exposure or privacy implications.

Mitigation Strategies

Update all Apple devices to the latest versions (iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27) to address the out-of-bounds write issue. Avoid processing untrusted or suspicious images until updates are applied.

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