CVE-2026-80114: PassMark PerformanceTest, BurnInTest, and OSForensics Hard-coded Credentials Authentication Bypass via DirectIo64.sys
PassMark PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build 1000, and OSForensics before 11.1 build 1016 contain a hard-coded credentials vulnerability in DirectIo64.sys that allows local attackers to perform arbitrary physical memory writes by extracting an 8-byte key embedded as a hardcoded literal in the distributed binary and computing valid MD5 authentication tags for arbitrary IOCTL write requests. Attackers can additionally bypass a secondary validation gate by using the driver's own bit-clear IOCTL to clear a single bit in the gating instruction's displacement byte, causing all subsequent write requests to skip MAC verification, size checks, and Vendor ID checks entirely.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this issue?
Systems running affected versions of PassMark PerformanceTest, BurnInTest, or OSForensics are exposed if the DirectIo64.sys driver is present. Exploitation is local and requires low-privileged access on the target system.
What does an attacker need to exploit it?
An attacker needs the ability to run locally and issue IOCTL requests to DirectIo64.sys. They can extract the embedded 8-byte key from the distributed binary to generate valid MD5 authentication tags, or use the driver's bit-clear IOCTL to disable subsequent request validation.
What is the impact after exploitation?
The vulnerability allows arbitrary physical memory writes. The validation-bypass technique causes later write requests to skip MAC verification, size checks, and Vendor ID checks.
Which versions need remediation?
PerformanceTest versions before 11.1 build 1012, BurnInTest versions before 11.1 build 1000, and OSForensics versions before 11.1 build 1016 are affected.