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CVE-2025-7026— SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0

EPSS 0.10% · P26
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I. Basic Information for CVE-2025-7026

Vulnerability Information
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Vulnerability Title
SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control the RBX register, which is used as an unchecked pointer in the CommandRcx0 function. If the contents at RBX match certain expected values (e.g., '$DB$' or '2DB$'), the function performs arbitrary writes to System Management RAM (SMRAM), leading to potential privilege escalation to System Management Mode (SMM) and persistent 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 Technology Gigabyte APP Center 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gigabyte Technology Gigabyte APP Center是中国台湾技嘉科技（Gigabyte Technology）公司的一套用于管理计算机中所有Gigabyte应用程序的软件。 Gigabyte Technology Gigabyte APP Center存在安全漏洞，该漏洞源于未验证指针，可能导致任意写入和权限提升。
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

VendorProductAffected VersionsCPESubscribe
GIGABYTEUEFI-GenericComponentSmmEntry 1.0.0 -

II. Public POCs for CVE-2025-7026

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III. Intelligence Information for CVE-2025-7026

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Same Patch Batch · GIGABYTE · 2025-07-11 · 4 CVEs total

CVE-2025-7029SMM Arbitrary Write via Unchecked OcHeader Buffer in Platform Configuration Handler
CVE-2025-7028SMM Arbitrary Memory Access via Flash Handler with Unchecked FuncBlock Pointer
CVE-2025-7027SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1

IV. Related Vulnerabilities

Same product: UEFI-GenericComponentSmmEntry
Same vendor: GIGABYTE

V. Comments for CVE-2025-7026

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