---
id: CVE-2026-80117
title: >-
  PassMark PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build
  1000, and OSForensics before 11.1 build 1016 contain a privilege escalation
  vulnerability in DirectIo64.sys that allows local users to issue arbitrary IN
  and O…
summary: >-
  PassMark PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build
  1000, and OSForensics before 11.1 build 1016 contain a privilege escalation
  vulnerability in DirectIo64.sys that allows local users to issue arbitrary IN
  and O…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-782
published: '2026-09-04'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:10:30.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80117'
references:
  - url: 'https://dkom.dev/posts/directio64-disclosure/'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/floppywiggler/directio64-disclosure'
    label: disclosure@vulncheck.com
  - url: 'https://www.osforensics.com/whats-new.html'
    label: disclosure@vulncheck.com
  - url: 'https://www.passmark.com/products/burnintest/history.php'
    label: disclosure@vulncheck.com
  - url: 'https://www.passmark.com/products/performancetest/history.php'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/passmark-performancetest-burnintest-and-osforensics-arbitrary-i-o-port-access-via-directio64-sys
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00163
epssPercentile: 0.04899
ingestedAt: '2026-09-08T21:11:12.295Z'
---

## Overview

PassMark PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build 1000, and OSForensics before 11.1 build 1016 contain a privilege escalation vulnerability in DirectIo64.sys that allows local users to issue arbitrary IN and OUT instructions to any x86 I/O port due to missing allowlist or port validation on exposed IOCTLs. Attackers can obtain a device handle and write to sensitive ports including the PS/2 controller port, CPU reset ports, CMOS configuration ports, and interrupt controller ports to cause an immediate system reset or other hardware-level manipulation from a standard user account.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.