{
  "threat_severity" : "Important",
  "public_date" : "2017-06-20T00:00:00Z",
  "bugzilla" : {
    "description" : "xen: grant table operations mishandle reference counts (XSA-224)",
    "id" : "1458878",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1458878"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.5",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
    "status" : "draft"
  },
  "details" : [ "The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2." ],
  "acknowledgement" : "Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Jan Beulich (SUSE) as the original reporter.",
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Will not fix",
    "package_name" : "xen",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2017-10921\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-10921\nhttp://xenbits.xen.org/xsa/advisory-224.html" ],
  "name" : "CVE-2017-10921",
  "mitigation" : {
    "value" : "Running only HVM guests will avoid this vulnerability.",
    "lang" : "en:us"
  },
  "csaw" : false
}