CVE-2021-26342

{"id": "CVE-2021-26342", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.3, "attackVector": "LOCAL", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 1.8}]}, "published": "2022-05-11T17:15:08.297", "references": [{"url": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028", "tags": ["Vendor Advisory"], "source": "psirt@amd.com"}, {"url": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability."}, {"lang": "es", "value": "En las m\u00e1quinas virtuales invitadas de SEV, la CPU puede fallar al vaciar la memoria intermedia de traducci\u00f3n (TLB) despu\u00e9s de una secuencia particular de operaciones que incluye la creaci\u00f3n de un nuevo bloque de control de m\u00e1quina virtual (VMCB). El fallo en el vaciado del TLB puede causar que el microc\u00f3digo use traducciones del TLB obsoletas, lo que puede permitir una divulgaci\u00f3n del contenido de la memoria del hu\u00e9sped de SEV. Los usuarios de m\u00e1quinas virtuales invitadas SEV-ES/SEV-SNP no est\u00e1n afectados por esta vulnerabilidad"}], "lastModified": "2024-11-21T05:56:09.363", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:amd:epyc_7763_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B25C6225-69FF-4772-84F7-F560AAE3617E", "versionEndExcluding": "milanpi-sp3_1.0.0.7"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:amd:epyc_7763:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "4F900BDD-F094-41A6-9A23-31F53DBA95D4"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:amd:epyc_7713p_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E1DB1651-2E51-434E-810F-83428B648E7A", "versionEndExcluding": "milanpi-sp3_1.0.0.7"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:amd:epyc_7713p:-:*:*:*:*:*:*:*", "vulnerable": 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