{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-09-08T17:08:32.715Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://xenbits.xen.org/xsa/advisory-510.html"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/09/08/7"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Xen",
          "vendor": "Xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-510"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "Xen versions 4.6 and later are vulnerable.  This is known to be the case\nwith the fix for XSA-491, but it\u0027s possible the issue can also be\ntriggered from other, non-analyzed paths.\n\nOnly x86 systems are vulnerable.  Arm systems are not vulnerable.\n\nOnly HVM guests with a PCI device with IO BARs assigned can leverage the\nvulnerability."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "This issue was discovered by Jiqian Chen of AMD and diagnosed as a\nsecurity issue by Roger Pau Monn\u00e9 of AMD."
        }
      ],
      "datePublic": "2026-09-08T12:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A guest with a PCI device assigned that has at least a BAR on the IO port\nspace can trigger a BUG() in Xen."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Passing through a PCI device with at least one BAR in IO address space to\nunprivileged HVM guests can result in a Denial of Service (DoS) affecting\nthe entire host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-08T12:11:08.534Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-510.html"
        }
      ],
      "title": "x86: improper handling of HVM emulation return codes",
      "workarounds": [
        {
          "lang": "en",
          "value": "There is no mitigation available."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2026-79602",
    "datePublished": "2026-09-08T12:11:08.534Z",
    "dateReserved": "2026-08-25T07:35:05.289Z",
    "dateUpdated": "2026-09-08T17:08:32.715Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-79602\",\"sourceIdentifier\":\"security@xen.org\",\"published\":\"2026-09-08T13:17:27.157\",\"lastModified\":\"2026-09-08T19:20:25.117\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A guest with a PCI device assigned that has at least a BAR on the IO port\\nspace can trigger a BUG() in Xen.\"}],\"affected\":[{\"source\":\"security@xen.org\",\"affectedData\":[{\"vendor\":\"Xen\",\"product\":\"Xen\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"consult Xen advisory XSA-510\",\"status\":\"unknown\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://xenbits.xenproject.org/xsa/advisory-510.html\",\"source\":\"security@xen.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/09/08/7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://xenbits.xen.org/xsa/advisory-510.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "current_release_date": "2026-09-08T21:22:59+00:00",
      "cve": "CVE-2026-79602",
      "id": "CVE-2026-79602",
      "initial_release_date": "2026-09-08T12:11:08.534000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "xen: Xen: Denial of Service due to improper handling of HVM emulation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79602.json",
      "version": "3"
    }
  }
}