CVE-2025-7027— SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1
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I. Basic Information for CVE-2025-7027
Vulnerability Information
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Vulnerability Title
SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
GIGABYTE Chipsets 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| GIGABYTE | UEFI-GenericComponentSmmEntry | 1.0.0 | - |
II. Public POCs for CVE-2025-7027
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · GIGABYTE · 2025-07-11 · 4 CVEs total
| CVE-2025-7029 | SMM Arbitrary Write via Unchecked OcHeader Buffer in Platform Configuration Handler | |
| CVE-2025-7028 | SMM Arbitrary Memory Access via Flash Handler with Unchecked FuncBlock Pointer | |
| CVE-2025-7026 | SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0 |
IV. Related Vulnerabilities
Same vendor: GIGABYTE
- CVE-2026-4416
GIGABYTE｜Performance Library - Insecure Deserialization - CVE-2026-4415
GIGABYTE｜Gigabyte Control Center - Arbitrary File Write - CVE-2026-0870
GIGABYTE｜MacroHub - Local Privilege Escalation - CVE-2025-14302
GIGABYTE｜Motherboard - Protection Mechanism Failure - CVE-2025-7026
SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0
V. Comments for CVE-2025-7027
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