CVE-2026-84596

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in iOS and macOS via Malicious Font

Publication date: 2026-09-14

Last updated on: 2026-09-16

Assigner: Apple Inc.

Description

An out-of-bounds read 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 font may result in the disclosure of process memory.

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-84596

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 where processing a maliciously crafted font could allow access to memory outside the intended boundaries. This might lead to the disclosure of sensitive process memory.

Detection Guidance

This vulnerability involves an out-of-bounds read in font processing, which may lead to memory disclosure. Detection requires checking system versions against the patched releases (iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27). No specific commands are provided in the context for detection.

Impact Analysis

If exploited, this vulnerability could allow an attacker to read sensitive memory from your device. This might include personal data, credentials, or other confidential information stored in memory.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves an out-of-bounds read that could lead to process memory disclosure when processing maliciously crafted fonts. This may pose risks to data confidentiality, which could indirectly affect compliance if sensitive data is exposed.

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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