vNUMA domain cleanup may race other operations

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-62429",
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "dateUpdated": "2026-07-28T13:34:11.039Z",
    "dateReserved": "2026-07-14T10:28:12.655Z",
    "datePublished": "2026-07-28T12:32:24.333Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN",
        "dateUpdated": "2026-07-28T12:32:24.333Z"
      },
      "datePublic": "2026-07-28T12:00:00.000Z",
      "title": "vNUMA domain cleanup may race other operations",
      "descriptions": [
        {
          "lang": "en",
          "value": "Accessing the vNUMA configuration data of a guest is still possible when\ndomain destruction has already started.  The cleaning up of that\nconfiguration information is not synchronized with its retrieval by a\ndevice model controlling the guest."
        }
      ],
      "affected": [
        {
          "vendor": "Xen",
          "product": "Xen",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "consult Xen advisory XSA-502",
              "status": "unknown"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-502.html"
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "While Denial of Service (DoS) affecting the entire host and information\nleaks and are the prevailing effect, a device model stub domain or a\nde-privileged device model running in the control domain may also be\nable to elevate its privileges to that of the host."
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "All Xen versions from 4.5 onwards are vulnerable.  Xen versions 4.4 and\nearlier are not vulnerable.\n\nOnly entities controlling guests (on x86: HVM guests) can leverage the\nvulnerability.  These are device models running in either a stub domain or\nde-privileged in Dom0.\n\nOnly guests which have vNUMA enabled allow their controlling entities to\nleverage the vulnerability."
        }
      ],
      "workarounds": [
        {
          "lang": "en",
          "value": "On x86, running only PV or PVH guests will avoid the vulnerability.\n\nNot enabling vNUMA for HVM guests will also avoid the vulnerability."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "This issue was discovered by Teddy Astie of Vates.",
          "type": "finder"
        }
      ]
    },
    "adp": [
      {
        "providerMetadata": {
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE",
          "dateUpdated": "2026-07-28T13:34:11.039Z"
        },
        "title": "CVE Program Container",
        "references": [
          {
            "url": "http://xenbits.xen.org/xsa/advisory-502.html"
          }
        ]
      }
    ]
  }
}