Out-of-Bounds Read in macOS Golden Gate

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apple Inc.

Description

An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27. Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure.

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-2026-86900

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos_golden_gate	27

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 input validation when processing exFAT volumes. A maliciously crafted exFAT volume could trigger this issue, leading to unexpected system crashes or exposure of kernel memory contents.

Impact Analysis

If exploited, this vulnerability could cause your system to crash unexpectedly while mounting a malicious exFAT volume. In some cases, it might also allow disclosure of sensitive kernel memory, potentially leaking information.

Mitigation Strategies

Update macOS Golden Gate 27 to the latest version to address the out-of-bounds read issue. Avoid mounting untrusted exFAT volumes until the update is applied.

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