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 clear arbitrary bits at any physical memory address due to missing validation of the physical address parameter in an exposed IOCTL handler. Attackers can obtain a device handle and supply an arbitrary 64-bit physical address with a bit index to invoke MmMapIoSpace and clear bits in kernel code pages or page table entries, enabling local privilege escalation or system compromise.

A privilege escalation vulnerability exists in DirectIo64.sys, a kernel driver used by PassMark PerformanceTest, BurnInTest, and OSForensics. The flaw stems from missing validation of the physical address parameter in an exposed IOCTL handler. Local attackers can obtain a device handle and supply an arbitrary 64-bit physical address with a bit index to invoke MmMapIoSpace, allowing them to clear arbitrary bits at any physical memory address. This can be leveraged to corrupt kernel code pages or page table entries, enabling local privilege escalation or full system compromise. Affected versions include PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build 1000, and OSForensics before 11.1 build 1016. Fixed builds have been released by PassMark for all three products. The vulnerability is particularly concerning as it affects widely used benchmarking and forensics tools that install kernel-level drivers. No active exploitation in the wild has been reported at the time of disclosure.