{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62434","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","state":"PUBLISHED","assignerShortName":"XEN","dateReserved":"2026-07-14T10:28:12.655Z","datePublished":"2026-07-28T12:33:08.540Z","dateUpdated":"2026-07-28T16:33:34.668Z"},"containers":{"cna":{"title":"PoD: Don't try to reclaim special pages","datePublic":"2026-07-28T12:00:00.000Z","descriptions":[{"lang":"en","value":"A guest started with Populated on Demand enabled (PoD) can attempt to\nreclaim pages which aren't regular guest RAM.  This can cause corruption\nof memory management state in Xen."}],"impacts":[{"descriptions":[{"lang":"en","value":"A buggy or malicious guest can cause corruption of Xen's state, leading\nto crashes or other malfunctions.  Information leak and privilege\nescalation cannot be ruled out."}]}],"affected":[{"defaultStatus":"unknown","product":"Xen","vendor":"Xen","versions":[{"status":"unknown","version":"consult Xen advisory XSA-507"}]}],"configurations":[{"lang":"en","value":"All Xen versions from 3.4 onwards are vulnerable.  Xen versions 3.3 and\nearlier are not vulnerable.\n\nOnly x86 systems are vulnerable.\n\nOnly x86 HVM and PVH guests started in populate-on-demand mode are\nbelieved to be able to leverage the vulnerability.  Populate-on-demand\nmode is activated when the guest's xl configuration file specifies a\n\"maxmem\" value which is larger than the \"memory\" value."}],"workarounds":[{"lang":"en","value":"Running only PV guests or HVM/PVH guests without PoD will avoid the\nvulnerability."}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-507.html"}],"providerMetadata":{"orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","shortName":"XEN","dateUpdated":"2026-07-28T12:33:08.540Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://xenbits.xen.org/xsa/advisory-507.html"},{"url":"http://www.openwall.com/lists/oss-security/2026/07/28/23"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-07-28T16:33:34.668Z"}},{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds Write"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.3,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"LOW","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-07-28T14:59:52.970334Z","id":"CVE-2026-62434","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-28T15:00:00.728Z"}}]}}