{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-27466", "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "state": "PUBLISHED", "assignerShortName": "XEN", "dateReserved": "2025-02-26T09:16:54.462Z", "datePublished": "2025-09-11T14:05:29.525Z", "dateUpdated": "2025-09-11T14:40:33.401Z"}, "containers": {"cna": {"title": "Mutiple vulnerabilities in the Viridian interface", "datePublic": "2025-09-09T11:53:00.000Z", "descriptions": [{"lang": "en", "value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nThere are multiple issues related to the handling and accessing of guest\nmemory pages in the viridian code:\n\n 1. A NULL pointer dereference in the updating of the reference TSC area.\n This is CVE-2025-27466.\n\n 2. A NULL pointer dereference by assuming the SIM page is mapped when\n a synthetic timer message has to be delivered. This is\n CVE-2025-58142.\n\n 3. A race in the mapping of the reference TSC page, where a guest can\n get Xen to free a page while still present in the guest physical to\n machine (p2m) page tables. This is CVE-2025-58143."}], "impacts": [{"descriptions": [{"lang": "en", "value": "Denial of Service (DoS) affecting the entire host, information leaks, or\nelevation of privilege."}]}], "affected": [{"defaultStatus": "unknown", "product": "Xen", "vendor": "Xen", "versions": [{"status": "unknown", "version": "consult Xen advisory XSA-472"}]}], "configurations": [{"lang": "en", "value": "Xen versions 4.13 and newer are vulnerable. Xen versions 4.12 and older\nare not vulnerable.\n\nOnly x86 HVM guests which have the reference_tsc or stimer viridian\nextensions enabled are vulnerable."}], "workarounds": [{"lang": "en", "value": "Not enabling the reference_tsc and stimer viridian extensions will avoid\nthe issues."}], "credits": [{"lang": "en", "type": "finder", "value": "This issue was discovered by Roger Pau Monn\u00e9 of XenServer."}], "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-472.html"}], "providerMetadata": {"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "shortName": "XEN", "dateUpdated": "2025-09-11T14:05:29.525Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-395", "lang": "en", "description": "CWE-395 Use of NullPointerException Catch to Detect NULL Pointer Dereference"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-09-11T14:25:53.637084Z", "id": "CVE-2025-27466", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-09-11T14:40:33.401Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-27466", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-09-11T14:25:53.637084Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-395", "description": "CWE-395 Use of NullPointerException Catch to Detect NULL Pointer Dereference"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-09-11T14:26:20.300Z"}}], "cna": {"title": "Mutiple vulnerabilities in the Viridian interface", "credits": [{"lang": "en", "type": "finder", "value": "This issue was discovered by Roger Pau Monn\u00e9 of XenServer."}], "impacts": [{"descriptions": [{"lang": "en", "value": "Denial of Service (DoS) affecting the entire host, information leaks, or\nelevation of privilege."}]}], "affected": [{"vendor": "Xen", "product": "Xen", "versions": [{"status": "unknown", "version": "consult Xen advisory XSA-472"}], "defaultStatus": "unknown"}], "datePublic": "2025-09-09T11:53:00.000Z", "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-472.html"}], "workarounds": [{"lang": "en", "value": "Not enabling the reference_tsc and stimer viridian extensions will avoid\nthe issues."}], "descriptions": [{"lang": "en", "value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nThere are multiple issues related to the handling and accessing of guest\nmemory pages in the viridian code:\n\n 1. A NULL pointer dereference in the updating of the reference TSC area.\n This is CVE-2025-27466.\n\n 2. A NULL pointer dereference by assuming the SIM page is mapped when\n a synthetic timer message has to be delivered. This is\n CVE-2025-58142.\n\n 3. A race in the mapping of the reference TSC page, where a guest can\n get Xen to free a page while still present in the guest physical to\n machine (p2m) page tables. This is CVE-2025-58143."}], "configurations": [{"lang": "en", "value": "Xen versions 4.13 and newer are vulnerable. Xen versions 4.12 and older\nare not vulnerable.\n\nOnly x86 HVM guests which have the reference_tsc or stimer viridian\nextensions enabled are vulnerable."}], "providerMetadata": {"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "shortName": "XEN", "dateUpdated": "2025-09-11T14:05:29.525Z"}}}, "cveMetadata": {"cveId": "CVE-2025-27466", "state": "PUBLISHED", "dateUpdated": "2025-09-11T14:40:33.401Z", "dateReserved": "2025-02-26T09:16:54.462Z", "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "datePublished": "2025-09-11T14:05:29.525Z", "assignerShortName": "XEN"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nThere are multiple issues related to the handling and accessing of guest\nmemory pages in the viridian code:\n\n 1. A NULL pointer dereference in the updating of the reference TSC area.\n This is CVE-2025-27466.\n\n 2. A NULL pointer dereference by assuming the SIM page is mapped when\n a synthetic timer message has to be delivered. This is\n CVE-2025-58142.\n\n 3. A race in the mapping of the reference TSC page, where a guest can\n get Xen to free a page while still present in the guest physical to\n machine (p2m) page tables. This is CVE-2025-58143."}], "id": "CVE-2025-27466", "lastModified": "2025-09-11T15:15:33.540", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-09-11T14:15:41.413", "references": [{"source": "security@xen.org", "url": "https://xenbits.xenproject.org/xsa/advisory-472.html"}], "sourceIdentifier": "security@xen.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-395"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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