CVE-2026-86903

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Apple iOS and macOS

Publication date: 2026-09-14

Last updated on: 2026-09-16

Assigner: Apple Inc.

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. An app may be able to disclose kernel memory.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-14

Last Modified

2026-09-16

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-86903

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-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability caused by insufficient input validation. It allows an application to read memory outside its intended boundaries, potentially exposing sensitive kernel memory.

Detection Guidance

This vulnerability is specific to Apple operating systems and requires updating to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, or watchOS 27 to be resolved. Detection involves checking your current OS version against these updates.

Impact Analysis

An attacker could exploit this to access kernel memory, leading to unauthorized data disclosure or potential system compromise. This may allow sensitive information theft or privilege escalation on affected devices.

Compliance Impact

The vulnerability involves an out-of-bounds read that may allow disclosure of kernel memory. This could potentially expose sensitive data, which may impact compliance with standards like GDPR (data protection) or HIPAA (health information privacy) if exploited.

Mitigation Strategies

Update affected Apple devices to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, or watchOS 27 to address the out-of-bounds read vulnerability.

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