{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42488","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","state":"PUBLISHED","assignerShortName":"XEN","dateReserved":"2026-04-27T14:20:24.138Z","datePublished":"2026-06-18T13:47:23.838Z","dateUpdated":"2026-06-18T15:07:35.190Z"},"containers":{"cna":{"title":"x86: mismatched mapcache metadata","datePublic":"2026-06-09T12:00:00.000Z","descriptions":[{"lang":"en","value":"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."}],"impacts":[{"descriptions":[{"lang":"en","value":"Privilege escalation, Denial of Service (DoS) affecting the entire host,\nand information leaks."}]}],"affected":[{"defaultStatus":"unknown","product":"Xen","vendor":"Xen","versions":[{"status":"unknown","version":"consult Xen advisory XSA-494"}]}],"configurations":[{"lang":"en","value":"Xen 4.15 and onwards are vulnerable.  Any Xen version with the fix for\nXSA-438 applied is vulnerable.\n\nOnly x86 systems are vulnerable.  Only 64-bit PV guests can leverage the\nvulnerability, and only when running in shadow mode.  Shadow mode would\nbe in use when migrating guests or as a workaround for XSA-273 (L1TF)."}],"workarounds":[{"lang":"en","value":"Running only HVM or PVH guests will avoid the vulnerability.\n\nRunning PV guests in the PV shim will also avoid the vulnerability."}],"credits":[{"lang":"en","type":"finder","value":"This issue was discovered by Roger Pau Monné of XenServer."}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-494.html"}],"providerMetadata":{"orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","shortName":"XEN","dateUpdated":"2026-06-18T13:47:23.838Z"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-119","lang":"en","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.1,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-18T15:02:17.385668Z","id":"CVE-2026-42488","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-18T15:03:20.373Z"}},{"title":"CVE Program Container","references":[{"url":"http://xenbits.xen.org/xsa/advisory-494.html"},{"url":"http://www.openwall.com/lists/oss-security/2026/06/09/14"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-06-18T15:07:35.190Z"}}]}}