CVE-2025-7026: GIGABYTE UEFI-Genericcomponentsmmentry

High severity, CVSS 8.2. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• GIGABYTE UEFI-Genericcomponentsmmentry: version 1.0.0 only

Published 2025-07-11. Last modified 2026-06-17.