CVE-2026-43783

Analyzed Analyzed - Analysis Complete

macOS Tahoe Race Condition Leads to Root Privilege Escalation

Publication date: 2026-09-14

Last updated on: 2026-09-15

Assigner: Apple Inc.

Description

A race condition was addressed with improved locking. This issue is fixed in macOS Tahoe 26.6. A malicious app may be able to gain root privileges.

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-2026-43783

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This is a race condition vulnerability in macOS Tahoe where improper locking mechanisms could allow a malicious application to exploit timing issues and gain elevated root privileges on the system.

Detection Guidance

This vulnerability is specific to macOS Tahoe and involves a race condition that could allow privilege escalation. Detection requires checking system logs for unusual privilege changes or app behavior. Use commands like 'log show --predicate "eventMessage CONTAINS 'root'"' to review system logs for unauthorized root access attempts.

Impact Analysis

If exploited, this vulnerability could allow an attacker to gain full control of your system with root privileges, potentially leading to unauthorized data access, system modifications, or installation of malicious software.

Compliance Impact

This vulnerability allows a malicious app to gain root privileges, which could lead to unauthorized access to sensitive data. This may impact compliance with regulations like GDPR and HIPAA by increasing the risk of data breaches and unauthorized data exposure.

Mitigation Strategies

Update macOS Tahoe to version 26.6 or later to address the race condition and prevent potential root privilege escalation.

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