CVE-2026-129255: CoolerMaster MASTERPLUS+ Device Driver WinRing0x64.sys sub_11504 default permission

A vulnerability was identified in CoolerMaster MASTERPLUS+ 1.9.6. This affects the function sub11504 in the library WinRing0x64.sys of the component Device Driver. The manipulation of the argument PhysicalAddress leads to incorrect default permissions. The attack can only be performed from a local environment. The vendor was contacted early about this disclosure but did not respond in any way.