Out-of-Bounds Read in macOS Golden Gate 27

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apple Inc.

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Processing a maliciously crafted disk image may lead to unexpected app termination.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-14

Last Modified

2026-09-14

Generated

2026-09-15

AI Q&A

2026-09-15

EPSS Evaluated

N/A

NVD

CVE-2026-84565

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos_golden_gate	27
apple	macos_sequoia	15.8
apple	macos_tahoe	26.7

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability caused by insufficient bounds checking. It allows processing a maliciously crafted disk image to trigger unexpected app termination. The issue was fixed in specific macOS versions: Golden Gate 27, Sequoia 15.8, and Tahoe 26.7.

Impact Analysis

If exploited, this vulnerability could cause applications to crash unexpectedly when opening a specially crafted disk image. This may lead to data loss or disruption of services relying on those applications.

Mitigation Strategies

Update to the latest versions of macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 to address the out-of-bounds read vulnerability.

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