Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| GIGABYTE / UEFI-GenericComponentSmmEntry | affected 1.0.0 |
CWE
No CWE identifiers supplied.
References
- https://www.gigabyte.com/Support/Security
- https://www.binarly.io/advisories/brly-dva-2025-008
- https://kb.cert.org/vuls/id/746790
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.