{"id":"CVE-2015-7835","url":"https://www.cyber-defence.io/tools/cve/CVE-2015-7835","generatedAt":"2026-10-28T04:15:58.765Z","title":"The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.","description":"The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.","published":"2015-10-30T15:59:05.000Z","lastModified":"2026-06-17T00:33:14.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":7.2,"severity":"HIGH","vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C"},"cwe":["CWE-20","CWE-264"],"affected":["xen/xen"],"epss":{"score":0.00427,"percentile":0.36778,"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 (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html","source":"cve@mitre.org"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html","source":"cve@mitre.org"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html","source":"cve@mitre.org"},{"url":"http://support.citrix.com/article/CTX202404","source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2015/dsa-3390","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/77366","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1034032","source":"cve@mitre.org"},{"url":"http://xenbits.xen.org/xsa/advisory-148.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-022-2015.txt","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/201604-03","source":"cve@mitre.org"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://support.citrix.com/article/CTX202404","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2015/dsa-3390","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/77366","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1034032","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xenbits.xen.org/xsa/advisory-148.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-022-2015.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201604-03","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2015-7835","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."}