---
id: CVE-2026-80115
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
  and denial-of-service vulnerability in DirectIo64.sys that allows local
  attackers t…
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
  and denial-of-service vulnerability in DirectIo64.sys that allows local
  attackers t…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H'
cwe:
  - CWE-782
vendor: PassMark Software
product: PerformanceTest
affected:
  - PerformanceTest < 11.1 build 1012
  - BurnInTest < 11.1 build 1000
  - OSForensics < 11.1 build 1016
published: '2026-09-04'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:16:53.780'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80115'
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-kernel-crash-via-directio64-sys-msr-write-ioctl
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00153
epssPercentile: 0.03713
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T19:21:14.990848Z'
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 and denial-of-service vulnerability in DirectIo64.sys that allows local attackers to read arbitrary Model-Specific Registers or write zero to any MSR through exposed IOCTLs with insufficient blocklist enforcement. Attackers can exploit the unrestricted write IOCTL to zero out the system call handler MSR, causing an immediate unrecoverable kernel crash on the next system call, or read security-sensitive MSRs used to locate kernel data structures.

## Remediation

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