{"id":"CVE-2016-9637","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-9637","generatedAt":"2026-10-29T00:46:57.857Z","title":"The (1) ioport_read and (2) ioport_write functions in Xen, when qemu is used as a device model within Xen, might allow local x86 HVM guest OS administrators to gain qemu process privileges via vectors involving an out-of-range ioport access.","description":"The (1) ioport_read and (2) ioport_write functions in Xen, when qemu is used as a device model within Xen, might allow local x86 HVM guest OS administrators to gain qemu process privileges via vectors involving an out-of-range ioport access.","published":"2017-02-17T02:59:14.000Z","lastModified":"2026-06-17T00:56:22.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-264"],"affected":["citrix/xenserver"],"epss":{"score":0.00364,"percentile":0.30112,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://rhn.redhat.com/errata/RHSA-2016-2963.html","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/94699","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1037397","source":"cve@mitre.org"},{"url":"http://xenbits.xen.org/xsa/advisory-199.html","source":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html","source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/201612-56","source":"cve@mitre.org"},{"url":"https://support.citrix.com/article/CTX219136","source":"cve@mitre.org"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-2963.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/94699","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1037397","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xenbits.xen.org/xsa/advisory-199.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201612-56","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.citrix.com/article/CTX219136","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-9637","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."}