CVE-2025-7026
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
11/07/2025
Last modified:
15/07/2025
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.
Impact
Base Score 3.x
8.20
Severity 3.x
HIGH