CVE-2025-7026 (GCVE-0-2025-7026)

Vulnerability from cvelistv5 – Published: 2025-07-11 15:27 – Updated: 2025-11-03 20:07
VLAI?
Title
SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0
Summary
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.
Severity ?
8.2 (High)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
GIGABYTE UEFI-GenericComponentSmmEntry Affected: 1.0.0
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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