CVE-2026-84571

Undergoing Analysis Undergoing Analysis - In Progress

Buffer Overflow in iOS 27 via Malicious Image Processing

Publication date: 2026-09-14

Last updated on: 2026-09-18

Assigner: Apple Inc.

Description

A buffer overflow 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

2026-09-14

Last Modified

2026-09-18

Generated

2026-11-08

AI Q&A

2026-09-15

EPSS Evaluated

2026-11-07

NVD

CVE-2026-84571

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-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a buffer overflow vulnerability caused by insufficient bounds checking when processing images. It occurs when an application fails to properly validate the size of input data, allowing it to write beyond allocated memory buffers. This can lead to crashes or unexpected behavior in affected systems.

Detection Guidance

This vulnerability is specific to Apple operating systems and is addressed by updating to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, or watchOS 27. Detection involves checking system versions rather than running commands. Verify your device is running the patched versions listed.

Impact Analysis

If you use iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, or watchOS 27, processing a malicious image could cause apps to terminate unexpectedly. This may disrupt device functionality or lead to data loss in some cases.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a buffer overflow in Apple operating systems that could cause app termination when processing malicious images.

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 buffer overflow issue.

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