CVE-2025-52347

HighLPE

Published: 01 May 2026

Published

01 May 2026

Modified

07 May 2026

KEV Added

—

Patch

—

CVSS Score 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0002 5.0th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-52347 is a high-severity Improper Input Validation (CWE-20) vulnerability in Passmark (inferred from references). Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 5.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 CM-10 (Software Usage Restrictions) and CM-7 (Least Functionality).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Privilege Escalation (T1068). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Directly requires timely remediation of the improper input validation flaw in DirectIo64.sys through vendor-provided patches to prevent privilege escalation.

CM-7 Least Functionality good match

prevent

Restricts the system to least functionality by prohibiting or disabling the non-essential DirectIo64.sys driver, eliminating the vulnerable IOCTL attack surface.

CM-10 Software Usage Restrictions good match

prevent

Authorizes and maintains only approved, patched versions of PassMark software, preventing the use of vulnerable builds containing DirectIo64.sys.

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

Why these techniques?

Kernel driver IOCTL flaw with improper input validation directly enables local privilege escalation to arbitrary kernel code execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

An issue in the component DirectIo64.sys of PassMark BurnInTest v11.0 Build 1011, OSForensics v11.1 Build 1007, and PerformanceTest v11.1 Build 1004 allows attackers to access kernel memory and escalate privileges via a crafted IOCTL 0x8011E044 call.

Deeper analysisAI

CVE-2025-52347 is a kernel driver vulnerability in the DirectIo64.sys component used by PassMark BurnInTest version 11.0 Build 1011, OSForensics version 11.1 Build 1007, and PerformanceTest version 11.1 Build 1004. The flaw, published on 2026-05-01, stems from improper input validation (CWE-20) and improper privilege management (CWE-269), enabling attackers to access kernel memory and escalate privileges through a crafted IOCTL call with code 0x8011E044. It carries a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high impact potential in local attack scenarios.

Local attackers with low-privilege (PR:L) user access can exploit this vulnerability with low complexity and no user interaction required. By sending a specially crafted IOCTL request to the DirectIo64.sys driver, they can read and write kernel memory, leading to full privilege escalation from user to kernel level. This grants attackers complete system control, including arbitrary code execution in kernel context, potentially bypassing security mitigations.

Mitigation details are outlined in vendor resources, including PassMark's product history pages for BurnInTest, PerformanceTest, and OSForensics, which document updates addressing the issue. Additional technical disclosure, including exploit details, is available in the GitHub repository at https://github.com/netero1010/Vulnerability-Disclosure/tree/main/CVE-2025-52347. Security practitioners should ensure affected software is updated to patched versions and consider disabling or removing the DirectIo64.sys driver if not essential.