CVE-2026-84550

Race Condition Enabling Unexpected System Termination

View on CVE.org
Published Sep 14, 2026 CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
Description
A race condition was addressed with additional validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

Analysis

AI-generated

Technical impact

A race condition present in certain macOS builds enables an application to trigger an unexpected system termination, causing the operating system to crash. This flaw is a concurrency bug (CWE‑362) that ends with a sudden OS shutdown when the race is triggered, leading to a denial‑of‑service at the system level.

Affected Systems

Apple macOS releases prior to the patch—macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7—are vulnerable. Any system still running one of these versions without applying the update is at risk, while newer releases are considered patched.

Risk and Exploitability

The EPSS score of <1 % indicates a very low likelihood of exploitation, and the vulnerability is not listed in CISA’s KEV catalog. The CVSS score of 4.7 reflects moderate severity. Exploitation would require a race condition to occur, and based on the description it is inferred that the attack may involve a privileged or buggy application. Overall risk is moderate for unpatched systems and low for those that have updated.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update macOS to the latest available release that includes the patch for the race condition.
  • Restart the computer to ensure all system processes are detached and that the crash issue is resolved.
  • Configure the system to automatically install macOS updates as soon as they become available.

Generated by OpenCVE AI on September 20, 2026 at 20:26 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Race Condition Enabling Unexpected System Termination
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
Type Values Removed Values Added
Weaknesses CWE-362
CPEs cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'}
Type Values Removed Values Added
Title Race Condition Allowing Unexpected System Termination in macOS
Weaknesses CWE-362
Type Values Removed Values Added
Title Race Condition Allowing Unexpected System Termination in macOS
Weaknesses CWE-362
Type Values Removed Values Added
First Time appeared Apple
Apple macos
Vendors & Products Apple
Apple macos
Type Values Removed Values Added
Description A race condition was addressed with additional validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.
References
Earlier changes (2)
Weaknesses
  • CWE-362

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Oct 26, 2026, 8:36 PM
Reserved
Sep 1, 2026, 9:13 PM

View source JSON

Updated
Sep 16, 2026, 3:34 PM

JSON

Status
Modified
Published
Sep 14, 2026, 9:17 PM
Modified
Sep 16, 2026, 4:17 PM

View source JSON

No data.

Updated
Sep 20, 2026, 8:30 PM

JSON