{"api_version":"1","generated_at":"2026-10-15T12:26:43+00:00","cve":"CVE-2026-102700","urls":{"html":"https://cve.report/CVE-2026-102700","api":"https://cve.report/api/cve/CVE-2026-102700.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-102700","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102700"},"summary":{"title":"gnttab: cache-flush handling may cause page reference leak","description":"With its original introduction, GNTTAB_cache_flush was made available\nuniformly.  XSA-232 (CVE-2017-14318) then covered an omitted NULL\npointer check, yet the addition of that check failed to adjust the\nsubsequent error path.  That error path fails to drop a page reference in\ncase the specified page is owned by a special system domain (DOM_IO and\nDOM_COW are system domains which can have memory pages assigned to them.)","state":"PUBLISHED","assigner":"XEN","published_at":"2026-10-13 16:17:09","updated_at":"2026-10-14 16:10:14"},"problem_types":[],"metrics":[],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-520.html","name":"https://xenbits.xenproject.org/xsa/advisory-520.html","refsource":"security@xen.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"http://xenbits.xen.org/xsa/advisory-520.html","name":"http://xenbits.xen.org/xsa/advisory-520.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102700","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102700","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Xen","product":"Xen","version":"unknown consult Xen advisory XSA-520","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[{"source":"CNA","title":"","value":"There is no known mitigation.","time":"","lang":"en"}],"exploits":[],"credits":[{"source":"CNA","value":"This issue was discovered independently by Andrew Cooper of Citrix and\nYehyeong Lee.","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"102700","cve":"CVE-2026-102700","epss":"0.001840000","percentile":"0.074540000","score_date":"2026-10-14","updated_at":"2026-10-15 00:01:23"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2026-10-13T16:11:54.099Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"http://xenbits.xen.org/xsa/advisory-520.html"}],"title":"CVE Program Container"}],"cna":{"affected":[{"defaultStatus":"unknown","product":"Xen","vendor":"Xen","versions":[{"status":"unknown","version":"consult Xen advisory XSA-520"}]}],"configurations":[{"lang":"en","value":"Xen versions 4.5 through 4.20 are affected.  Xen versions 4.21 and\nnewer as well as 4.4 and older are not affected.\n\nOnly x86 systems are vulnerable.  Arm systems are not vulnerable."}],"credits":[{"lang":"en","type":"finder","value":"This issue was discovered independently by Andrew Cooper of Citrix and\nYehyeong Lee."}],"datePublic":"2026-10-13T12:00:00.000Z","descriptions":[{"lang":"en","value":"With its original introduction, GNTTAB_cache_flush was made available\nuniformly.  XSA-232 (CVE-2017-14318) then covered an omitted NULL\npointer check, yet the addition of that check failed to adjust the\nsubsequent error path.  That error path fails to drop a page reference in\ncase the specified page is owned by a special system domain (DOM_IO and\nDOM_COW are system domains which can have memory pages assigned to them.)"}],"impacts":[{"descriptions":[{"lang":"en","value":"The most likely outcome is Denial of Service (DoS) of either Domain 0\n(then likely affecting the entire host) or of another domain."}]}],"providerMetadata":{"dateUpdated":"2026-10-13T15:45:27.794Z","orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","shortName":"XEN"},"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-520.html"}],"title":"gnttab: cache-flush handling may cause page reference leak","workarounds":[{"lang":"en","value":"There is no known mitigation."}]}},"cveMetadata":{"assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","assignerShortName":"XEN","cveId":"CVE-2026-102700","datePublished":"2026-10-13T15:45:27.794Z","dateReserved":"2026-09-29T16:11:40.973Z","dateUpdated":"2026-10-13T16:11:54.099Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-13 16:17:09","lastModifiedDate":"2026-10-14 16:10:14","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"102700","Ordinal":"1","Title":"gnttab: cache-flush handling may cause page reference leak","CVE":"CVE-2026-102700","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"102700","Ordinal":"1","NoteData":"With its original introduction, GNTTAB_cache_flush was made available\nuniformly.  XSA-232 (CVE-2017-14318) then covered an omitted NULL\npointer check, yet the addition of that check failed to adjust the\nsubsequent error path.  That error path fails to drop a page reference in\ncase the specified page is owned by a special system domain (DOM_IO and\nDOM_COW are system domains which can have memory pages assigned to them.)","Type":"Description","Title":"gnttab: cache-flush handling may cause page reference leak"}]}}}