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CVE-2025-7027

SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1

Published: Jul 11, 2025Updated: Nov 3, 2025 Sources: CVE List NVD BDU
NVD MITRE
8.2CVSSHIGH
EPSS Score
0.2%
Top 90.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Affected Products

GA-H110M-S2HPGigabyte Technology Co., Ltd.Hardware Firmware
Z590 GAMING XGigabyte Technology Co., Ltd.Hardware Firmware
H510M S2H V2Gigabyte Technology Co., Ltd.Hardware Firmware
H510M S2HGigabyte Technology Co., Ltd.Hardware Firmware
GA-H110M-S2VGigabyte Technology Co., Ltd.Hardware Firmware
gigabyte technology co., ltd.commercialTWConsumer Softwareaka gigabyte
and 218 more affected products View all →

Exploitability

Official Patch Available

References

https://www.gigabyte.com/Support/Security/2302
gigabyte.com
https://vuldb.com/?id.316179
vuldb.com
https://www.binarly.io/advisories/brly-2025-009
binarly.io
and 3 more references View all →

Timeline

Published
Jul 11, 2025
Last Updated
Nov 3, 2025

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