Description
An integer underflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker with control of a network file server may be able to cause unexpected system termination.
Published: 2026-10-20
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 20 Oct 2026 23:45:00 +0200

Type Values Removed Values Added
Title Integer Underflow in macOS Network File Server Leads to System Termination

Tue, 20 Oct 2026 21:15:00 +0200

Type Values Removed Values Added
Title Integer Underflow in Network File Server Causes System Termination on macOS
Weaknesses CWE-192

Tue, 20 Oct 2026 17:30:00 +0200

Type Values Removed Values Added
Weaknesses CWE-190
CWE-20
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 20 Oct 2026 14:45:00 +0200

Type Values Removed Values Added
Title Integer Underflow in Network File Server Causes System Termination on macOS
Weaknesses CWE-192

Tue, 20 Oct 2026 06:45:00 +0200

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Vendors & Products Apple
Apple macos

Tue, 20 Oct 2026 03:15:00 +0200

Type Values Removed Values Added
Description An integer underflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker with control of a network file server may be able to cause unexpected system termination.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apple

Published:

Updated: 2026-10-26T20:39:46.185Z

Reserved: 2026-09-08T16:43:41.870Z

Link: CVE-2026-86871

cve-icon Vulnrichment

Updated: 2026-10-20T14:39:00.504Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T01:17:25.253

Modified: 2026-10-20T15:17:33.953

Link: CVE-2026-86871

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T23:30:17Z

Weaknesses