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CVE-2025-7026

SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0

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

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.

No summary for this CVE yet.

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

Gigabyte Technology Co., Ltd.
commercial·TWaka gigabyte
GA-H110M-S2HP
Hardware Firmware
Z590 GAMING X
Hardware Firmware
H510M S2H V2
Hardware Firmware
H510M S2H
Hardware Firmware
GA-H110M-S2V
Hardware Firmware
GA-H110M-S2H
Hardware Firmware
H410M S2H V2 (rev. 1.9/2.1)
Hardware Firmware
H410M H V2 (rev. 1.9)
Hardware Firmware
GIGABYTE
commercial·TWaka app center, oc guru ii, aorus graphics engine
UEFI-GenericComponentSmmEntry
Hardware Firmware
and 69 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2025-7026?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://www.gigabyte.com/Support/Security
gigabyte.com
https://www.binarly.io/advisories/brly-dva-2025-008
binarly.io
https://kb.cert.org/vuls/id/746790
kb.cert.org
and 3 more references View all →

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