CVE-2025-7026

{"id": "CVE-2025-7026", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.2, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 1.5}]}, "published": "2025-07-11T16:15:26.897", "references": [{"url": "https://kb.cert.org/vuls/id/746790", "source": "cret@cert.org"}, {"url": "https://www.binarly.io/advisories/brly-dva-2025-008", "source": "cret@cert.org"}, {"url": "https://www.gigabyte.com/Support/Security", "source": "cret@cert.org"}], "vulnStatus": "Awaiting Analysis", "descriptions": [{"lang": "en", "value": "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$'), the function performs arbitrary writes to System Management RAM (SMRAM), leading to potential privilege escalation to System Management Mode (SMM) and persistent firmware compromise."}, {"lang": "es", "value": "Una vulnerabilidad en el controlador Software SMI (SwSmiInputValue 0xB2) permite a un atacante local controlar el registro RBX, que se utiliza como puntero sin control en la funci\u00f3n CommandRcx0. Si el contenido de RBX coincide con ciertos valores esperados (p. ej., '$DB$' o '2DB$'), la funci\u00f3n realiza escrituras arbitrarias en la RAM de administraci\u00f3n del sistema (SMRAM), lo que puede provocar una escalada de privilegios al modo de administraci\u00f3n del sistema (SMM) y una vulnerabilidad persistente del firmware."}], "lastModified": "2025-07-15T13:14:49.980", "sourceIdentifier": "cret@cert.org"}