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CVE-2025-7029— SMM Arbitrary Write via Unchecked OcHeader Buffer in Platform Configuration Handler

Quick assessment

Affected
GIGABYTE UEFI-OverClockSmiHandler
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 8.6 Difficulty: Hard EPSS 0.27% · P19

Possible ATT&CK Techniques 1 AI

T1055.003 · Thread Execution Hijacking
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I. Basic Information for CVE-2025-7029

Vulnerability Information
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Vulnerability Title
SMM Arbitrary Write via Unchecked OcHeader Buffer in Platform Configuration Handler
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control the RBX register, which is used to derive pointers (OcHeader, OcData) passed into power and thermal configuration logic. These buffers are not validated before performing multiple structured memory writes based on OcSetup NVRAM values, enabling arbitrary SMRAM corruption and potential SMM privilege escalation.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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-OverClockSmiHandler 1.0.0 -

II. Public POCs for CVE-2025-7029

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III. Intelligence Information for CVE-2025-7029

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

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
CVE-2025-7027 SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1

IV. Related Vulnerabilities

Same vendor: GIGABYTE