---
title: "CVE-2026-84544: Apple macOS - Integer Overflow"
description: "Apple macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7 contain an integer overflow caused by insufficient input validation when connecting to a malicious NFS server, letting attackers cause system termination or kernel memory corruption, exploit requires connection to malicious NFS server."
url: https://panop.io/threat-heartbeat/CVE-2026-84544/
---

# CVE-2026-84544 Apple macOS - Integer Overflow

Apple macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7 contain an integer overflow caused by insufficient input validation when connecting to a malicious NFS server, letting attackers cause system termination or kernel memory corruption, exploit requires connection to malicious NFS server.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.57% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-84544)

## Details

Type

Integer Overflow

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-190](https://cwe.mitre.org/data/definitions/190.html)

## Vendor fix

Update to macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-84544](https://nvd.nist.gov/vuln/detail/CVE-2026-84544)
- [https://support.apple.com/en-us/149042](https://support.apple.com/en-us/149042)
- [https://support.apple.com/en-us/149043](https://support.apple.com/en-us/149043)
- [https://support.apple.com/en-us/149035](https://support.apple.com/en-us/149035)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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