{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-46840", "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "state": "PUBLISHED", "assignerShortName": "XEN", "dateReserved": "2023-10-27T07:55:35.333Z", "datePublished": "2024-03-20T10:40:18.050Z", "dateUpdated": "2024-11-04T21:39:44.430Z"}, "containers": {"cna": {"title": "VT-d: Failure to quarantine devices in !HVM builds", "datePublic": "2024-01-30T12:00:00Z", "descriptions": [{"lang": "en", "value": "Incorrect placement of a preprocessor directive in source code results\nin logic that doesn't operate as intended when support for HVM guests is\ncompiled out of Xen.\n"}], "impacts": [{"descriptions": [{"lang": "en", "value": "When a device is removed from a domain, it is not properly quarantined\nand retains its access to the domain to which it was previously\nassigned.\n"}]}], "affected": [{"defaultStatus": "unknown", "product": "Xen", "vendor": "Xen", "versions": [{"status": "unknown", "version": "consult Xen advisory XSA-450"}]}], "configurations": [{"lang": "en", "value": "Xen 4.17 and onwards are vulnerable. Xen 4.16 and older are not\nvulnerable.\n\nOnly Xen running on x86 platforms with an Intel-compatible VT-d IOMMU is\nvulnerable. Platforms from other manufacturers, or platforms without a\nVT-d IOMMU are not vulnerable.\n\nOnly systems where PCI devices are passed through to untrusted or\nsemi-trusted guests are vulnerable. Systems which do not assign PCI\ndevices to untrusted guests are not vulnerable.\n\nXen is only vulnerable when CONFIG_HVM is disabled at build time. Most\ndeployments of Xen are expected to have CONFIG_HVM enabled at build\ntime, and would therefore not be vulnerable.\n"}], "workarounds": [{"lang": "en", "value": "There is no mitigation.\n"}], "credits": [{"lang": "en", "type": "finder", "value": "This issue was discovered by Teddy Astie of Vates\n"}], "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-450.html"}], "providerMetadata": {"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "shortName": "XEN", "dateUpdated": "2024-03-20T10:40:18.050Z"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T20:53:21.926Z"}, "title": "CVE Program Container", "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-450.html", "tags": ["x_transferred"]}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.1, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2024-08-05T18:59:02.763689Z", "id": "CVE-2023-46840", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-04T21:39:44.430Z"}}]}}

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{"descriptions": [{"lang": "en", "value": "Incorrect placement of a preprocessor directive in source code results\nin logic that doesn't operate as intended when support for HVM guests is\ncompiled out of Xen.\n"}, {"lang": "es", "value": "La ubicaci\u00f3n incorrecta de una directiva de preprocesador en el c\u00f3digo fuente da como resultado una l\u00f3gica que no funciona como se espera cuando el soporte para invitados HVM se compila desde Xen."}], "id": "CVE-2023-46840", "lastModified": "2024-11-21T08:29:24.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 4.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.5, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-03-20T11:15:08.180", "references": [{"source": "security@xen.org", "url": "https://xenbits.xenproject.org/xsa/advisory-450.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://xenbits.xenproject.org/xsa/advisory-450.html"}], "sourceIdentifier": "security@xen.org", "vulnStatus": "Awaiting Analysis"}

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{"created": "2025-07-12T22:23:58.620308+00:00", "updated": "2025-07-12T22:23:58.620357+00:00", "vendors": ["xen", "xen$PRODUCT$xen"]}