CVE-2026-18448

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18448", "assignerOrgId": "65518388-201a-4f93-8712-366d21fe8d2c", "state": "PUBLISHED", "assignerShortName": "TianoCore", "dateReserved": "2026-07-31T04:04:58.388Z", "datePublished": "2026-11-10T18:39:53.329Z", "dateUpdated": "2026-11-10T18:39:53.329Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "65518388-201a-4f93-8712-366d21fe8d2c", "shortName": "TianoCore", "dateUpdated": "2026-11-10T18:39:53.329Z"}, "title": "Leak SMM RAM from the kernel (Simply TSA after an SMI)", "datePublic": "2026-11-10T18:38:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1420", "description": "CWE-1420 Exposure of Sensitive Information during Transient Execution", "type": "CWE"}]}], "affected": [{"vendor": "TianoCore", "product": "EDK2", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "edk2-stable202608", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "EDK2 contains a vulnerability in BIOS\nwhere a privileged attacker may cause \u201cExposure of Sensitive Information during\nTransient Execution\u201d by local access. Successful exploitation of\nthis vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>EDK2 contains a vulnerability in BIOS\nwhere a privileged attacker may cause \u201cExposure of Sensitive Information during\nTransient Execution\u201d by local access. Successful exploitation of\nthis vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.</p>"}]}], "references": [{"url": "https://github.com/tianocore/edk2/security/advisories/GHSA-7v86-66vf-h88j"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.6, "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Abdul Lateef Attar", "type": "reporter"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "EDK2", "vendor": "TianoCore", "versions": [{"lessThanOrEqual": "edk2-stable202608", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "infosec@edk2.groups.io"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "EDK2 contains a vulnerability in BIOS\nwhere a privileged attacker may cause \u201cExposure of Sensitive Information during\nTransient Execution\u201d by local access. Successful exploitation of\nthis vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality."}], "id": "CVE-2026-18448", "lastModified": "2026-11-12T21:30:23.870", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.6, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "infosec@edk2.groups.io", "type": "Secondary"}]}, "published": "2026-11-10T19:21:15.707", "references": [{"source": "infosec@edk2.groups.io", "url": "https://github.com/tianocore/edk2/security/advisories/GHSA-7v86-66vf-h88j"}], "sourceIdentifier": "infosec@edk2.groups.io", "vulnStatus": "Awaiting Analysis"}

{}

{"created": "2026-11-12T03:30:21.823064+00:00", "updated": "2026-11-12T21:45:09.350825+00:00", "vendors": []}