CVE-2025-7027
SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1
Published: Jul 11, 2025Updated: Nov 3, 2025 Sources: CVE List NVD BDU
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:LAttack ComplexityLow
PR:HPrivileges RequiredHigh
UI:NUser InteractionNone
Scope
S:CScopeChanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:HAvailabilityHigh
Affected Products
Gigabyte Technology Co., Ltd.
commercial·TWaka gigabyte
GIGABYTE
commercial·TWaka app center, aorus graphics engine, oc guru ii
and 214 more affected products View all →
Exploitability
Official Patch Available
References
https://www.gigabyte.com/Support/Security
gigabyte.com
https://www.binarly.io/advisories/brly-2025-009
binarly.io
https://kb.cert.org/vuls/id/746790
kb.cert.org
and 3 more references View all →
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