Vulnerability details
CVE-2025-7026
GIGABYTE UEFI-GenericComponentSmmEntry
SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0
CVSS 3.1
8.2High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.2High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| GIGABYTE | UEFI-GenericComponentSmmEntry | 1.0.0 | CVEProject cvelistV5 (CNA) |
References and advisories
4
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Details
- Published
- 2025-07-11
- Last updated
- 2026-02-26
- State
- Published
- Assigner (CNA)
- certcc
Exploit prediction (EPSS)
0.23%
Probability of exploitation in 30 days
14.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- —