{"id":"CVE-2025-7026","state":"PUBLISHED","title":"SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0","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$'), the function performs arbitrary writes to System Management RAM (SMRAM), leading to potential privilege escalation to System Management Mode (SMM) and persistent firmware compromise.","publishedAt":"2025-07-11T15:27:34.960Z","updatedAt":"2026-02-26T17:50:43.390Z","severity":{"score":8.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"certcc","products":["GIGABYTE UEFI-GenericComponentSmmEntry"],"affected":[{"vendor":"GIGABYTE","product":"UEFI-GenericComponentSmmEntry","versions":[{"version":"1.0.0","status":"affected"}]}],"references":["https://www.gigabyte.com/Support/Security","https://www.binarly.io/advisories/brly-dva-2025-008","https://kb.cert.org/vuls/id/746790","https://www.kb.cert.org/vuls/id/746790"],"weaknesses":[],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/7xxx/CVE-2025-7026.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-7026","state":"PUBLISHED","datePublished":"2025-07-11T15:27:34.960Z","dateUpdated":"2026-02-26T17:50:43.390Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2025-07-02T15:42:52.209Z"},"containers":{"cna":{"title":"SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0","descriptions":[{"lang":"en","value":"A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control the RBX register, which is used as an unchecked pointer in the CommandRcx0 function. If the contents at RBX match certain expected values (e.g., '$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."}],"affected":[{"vendor":"GIGABYTE","product":"UEFI-GenericComponentSmmEntry","versions":[{"version":"1.0.0","status":"affected"}]}],"references":[{"url":"https://www.gigabyte.com/Support/Security"},{"url":"https://www.binarly.io/advisories/brly-dva-2025-008"},{"url":"https://kb.cert.org/vuls/id/746790"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-822 Untrusted Pointer Dereference"}]}],"providerMetadata":{"shortName":"certcc","orgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateUpdated":"2025-07-11T15:27:34.960Z"},"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"VINCE 3.0.21","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2025-7026"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"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"}},{"other":{"type":"ssvc","content":{"id":"CVE-2025-7026","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-07-12T03:55:16.064357Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-26T17:50:43.390Z"}},{"title":"CVE Program Container","references":[{"url":"https://www.kb.cert.org/vuls/id/746790"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T20:07:19.993Z"}}]}}}