{"id":"CVE-2011-2901","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-2901","generatedAt":"2026-10-27T19:44:50.400Z","title":"Off-by-one error in the __addr_ok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service (host crash) via unspecified hypercalls that ignore virtual-address bits.","description":"Off-by-one error in the __addr_ok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service (host crash) via unspecified hypercalls that ignore virtual-address bits.","published":"2013-10-01T17:55:03.000Z","lastModified":"2026-06-16T23:32:13.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5.5,"severity":"MEDIUM","vector":"AV:A/AC:L/Au:S/C:N/I:N/A:C"},"cwe":["CWE-399"],"affected":["xen/xen"],"epss":{"score":0.0059,"percentile":0.47935,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.59%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://rhn.redhat.com/errata/RHSA-2011-1212.html","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/55082","source":"secalert@redhat.com"},{"url":"http://security.gentoo.org/glsa/glsa-201309-24.xml","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/09/02/2","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=728042","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2011-1212.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/55082","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://security.gentoo.org/glsa/glsa-201309-24.xml","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/09/02/2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=728042","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-2901","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}