CVE-2026-84543

Undergoing Analysis Undergoing Analysis - In Progress

Out-of-Bounds Access in macOS Golden Gate

Publication date: 2026-09-14

Last updated on: 2026-09-15

Assigner: Apple Inc.

Description

An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Connecting to a malicious SMB server may cause unexpected system termination or corrupt kernel memory.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-14

Last Modified

2026-09-15

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-84543

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

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds access issue caused by insufficient bounds checking. It allows a malicious SMB server to trigger unexpected system termination or corrupt kernel memory when a vulnerable macOS system connects to it.

Detection Guidance

This vulnerability is related to an out-of-bounds access issue in macOS components when connecting to a malicious SMB server. Detection primarily involves checking macOS versions and monitoring for unexpected system crashes or kernel memory corruption during SMB interactions. No specific commands are provided in the context to directly detect this issue.

Impact Analysis

If you connect to a malicious SMB server, your system may crash or experience kernel memory corruption, leading to potential data loss or instability. This could disrupt normal operations on affected macOS versions.

Compliance Impact

This vulnerability does not directly impact compliance with GDPR, HIPAA, or similar standards as it involves an out-of-bounds access issue in macOS that could lead to system termination or kernel memory corruption when connecting to a malicious SMB server. There is no evidence in the provided context that this issue affects data protection, privacy, or security controls required by these regulations.

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 access issue.

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