EUVD-2026-71688
GHSA-p6jp-vch5-mc54
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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
Low-privilege local user reaches ring-0 hardware via driver IOCTL, constituting a scope change; no confidentiality impact, full integrity and availability loss.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Privilege escalation through the DirectIo64.sys kernel driver affects three PassMark products - PerformanceTest before build 1012, BurnInTest before build 1000, and OSForensics before build 1016 - allowing any local Windows user with low privileges to issue arbitrary x86 IN/OUT instructions to hardware I/O ports via exposed IOCTLs that lack allowlist or port-range validation. From a standard user account an attacker can write to PS/2 controller, CPU reset, CMOS configuration, and interrupt controller ports, triggering an immediate forced system reset or persistent hardware-level manipulation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold an authenticated local Windows session on a host where at least one of the three affected PassMark products is installed with the DirectIo64.sys driver loaded and its device object accessible (default post-install state). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H, score 6.9) accurately characterises the threat: local access required, low privilege, no attack prerequisites, no confidentiality impact, but high integrity and availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patches are available: upgrade PassMark PerformanceTest to version 11.1 build 1012 or later, BurnInTest to 11.1 build 1000 or later, and OSForensics to 11.1 build 1016 or later using the respective patch history pages linked in the references. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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