CVE-2026-84515

Received Received - Intake

Out-of-Bounds Write in macOS Golden Gate

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apple Inc.

Description

An out-of-bounds write 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 lead to kernel memory corruption.

CVSS Scores

EPSS Scores

Probability:
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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-2026-84515

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 write vulnerability caused by insufficient bounds checking. When a user connects to a malicious SMB server, it may trigger kernel memory corruption in affected macOS versions.

Detection Guidance

This vulnerability is specific to Apple macOS systems and relates to an out-of-bounds write issue in SMB server interactions. Detection primarily involves checking your macOS version against the fixed releases: macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7. Use the command 'sw_vers' to check your current macOS version.

Impact Analysis

If exploited, this flaw could allow an attacker to corrupt kernel memory, potentially leading to system crashes, arbitrary code execution, or unauthorized access to sensitive data on your device.

Mitigation Strategies

Update your macOS system to the latest version immediately. For Golden Gate, Sequoia, or Tahoe users, install macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 respectively. Avoid connecting to untrusted SMB servers until the update is applied.

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