CVE-2025-51060 Information

Aug 06, 2025 cve

Description

An issue was discovered in CPUID cpuz.sys 1.0.5.4. An attacker can use DeviceIoControl with the unvalidated parameters 0x9C402440 and 0x9C402444 as IoControlCodes to perform RDMSR and WRMSR respectively. Through this process the attacker can modify MSR_LSTAR and hook KiSystemCall64. Afterward using Return-Oriented Programming (ROP) the attacker can manipulate the stack with pre-prepared gadgets disable the SMAP flag in the CR4 register and execute a user-mode syscall handler in the kernel context. It has not been confirmed whether this works on 32-bit Windows but it functions on 64-bit Windows if the core isolation feature is either absent or disabled.

Reference

http://cpuid.com http://cpuzsys.com https://github.com/ZiaLib/Zmsr

CNNVD-202508-360 (Published: 2025-08-05)

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