CVE-2026-80115 json
PassMark PerformanceTest, BurnInTest, and OSForensics Kernel Crash via DirectIo64.sys MSR Write IOCTL
published 2026-09-04 2 mo ago modified 2026-10-01 38 d ago also EUVD-2026-71686
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
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 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.
Patch / fix
- PassMark Software PerformanceTest 11.1 build 1012
- PassMark Software BurnInTest 11.1 build 1000
- PassMark Software OSForensics 11.1 build 1016
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 55 d ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/floppywiggler/directio64-disclosure referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- PassMark Software PerformanceTest
- PassMark Software BurnInTest
- PassMark Software OSForensics
Classification
- Weakness
-
- CWE-782 Exposed IOCTL with Insufficient Access Control
References
-
passmark.com
/products/performancetest/history.php
release-notes, patch
-
passmark.com
/products/burnintest/history.php
release-notes, patch
-
osforensics.com
/whats-new.html
release-notes, patch
-
github.com
/floppywiggler/directio64-disclosure
technical-description, exploit
-
dkom.dev
/posts/directio64-disclosure/
technical-description
-
vulncheck.com
/advisories/passmark-performancetest-burnintest-and-osforensics-kernel-crash-via-directio64-sys-msr-write-ioct
third-party-advisory
Sources
- CVE List CVE-2026-80115
- NVD CVE-2026-80115
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