SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1

A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control both the read and write addresses used by the CommandRcx1 function. The write target is derived from an unvalidated UEFI NVRAM variable (SetupXtuBufferAddress), while the write content is read from an attacker-controlled pointer based on the RBX register. This dual-pointer dereference enables arbitrary memory writes within System Management RAM (SMRAM), leading to potential SMM privilege escalation and firmware compromise.

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GIGABYTE Chipsets 安全漏洞

GIGABYTE Chipsets是中国台湾技嘉（GIGABYTE）开源的一系列芯片组。 GIGABYTE Chipsets存在安全漏洞，该漏洞源于未验证指针，可能导致任意内存写入和权限提升。

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