{"id":"CVE-2026-42488","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-42488","generatedAt":"2026-10-28T05:59:40.134Z","title":"This causes a mismatch between the loaded page-tables and the mapcache metadata which can lead to corruption of the mapcache.","description":"Some shadow paging errors paths will switch the page-tables without\nupdating the currently running vCPU reference.  This causes a mismatch\nbetween the loaded page-tables and the mapcache metadata which can lead\nto corruption of the mapcache.","published":"2026-06-18T14:17:25.000Z","lastModified":"2026-06-22T18:38:03.000Z","status":"Deferred","sourceIdentifier":"security@xen.org","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-119"],"affected":[],"epss":{"score":0.00353,"percentile":0.28835,"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 (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-494.html","source":"security@xen.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/06/09/14","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xenbits.xen.org/xsa/advisory-494.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-42488","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."}