{"id":"CVE-2026-102700","state":"PUBLISHED","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.)","publishedAt":"2026-10-13T15:45:27.794Z","updatedAt":"2026-10-20T17:16:15.958Z","severity":{"score":4.7,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"XEN","products":["Xen Xen"],"affected":[{"vendor":"Xen","product":"Xen","defaultStatus":"unknown","versions":[{"version":"consult Xen advisory XSA-520","status":"unknown"}]}],"references":["https://xenbits.xenproject.org/xsa/advisory-520.html","http://xenbits.xen.org/xsa/advisory-520.html"],"weaknesses":["CWE-404"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102700.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102700","state":"PUBLISHED","datePublished":"2026-10-13T15:45:27.794Z","dateUpdated":"2026-10-20T17:16:15.958Z","assignerShortName":"XEN","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateReserved":"2026-09-29T16:11:40.973Z"},"containers":{"cna":{"title":"gnttab: cache-flush handling may cause page reference leak","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.)"}],"affected":[{"vendor":"Xen","product":"Xen","defaultStatus":"unknown","versions":[{"version":"consult Xen advisory XSA-520","status":"unknown"}]}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-520.html"}],"providerMetadata":{"shortName":"XEN","orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateUpdated":"2026-10-13T15:45:27.794Z"},"datePublic":"2026-10-13T12:00:00.000Z","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."}]}],"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."}],"workarounds":[{"lang":"en","value":"There is no known mitigation."}],"credits":[{"lang":"en","type":"finder","value":"This issue was discovered independently by Andrew Cooper of Citrix and\nYehyeong Lee."}]},"adp":[{"title":"CVE Program Container","references":[{"url":"http://xenbits.xen.org/xsa/advisory-520.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-10-13T16:11:54.099Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":4.7,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T17:15:12.175287Z","id":"CVE-2026-102700","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-404","type":"CWE","lang":"en","description":"CWE-404 Improper Resource Shutdown or Release"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T17:16:15.958Z"}}]}}}