{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79602","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","state":"PUBLISHED","assignerShortName":"XEN","dateReserved":"2026-08-25T07:35:05.289Z","datePublished":"2026-09-08T12:11:08.534Z","dateUpdated":"2026-09-10T18:08:59.554Z"},"containers":{"cna":{"title":"x86: improper handling of HVM emulation return codes","datePublic":"2026-09-08T12:00:00.000Z","descriptions":[{"lang":"en","value":"A guest with a PCI device assigned that has at least a BAR on the IO port\nspace can trigger a BUG() in Xen."}],"impacts":[{"descriptions":[{"lang":"en","value":"Passing through a PCI device with at least one BAR in IO address space to\nunprivileged HVM guests can result in a Denial of Service (DoS) affecting\nthe entire host."}]}],"affected":[{"defaultStatus":"unknown","product":"Xen","vendor":"Xen","versions":[{"status":"unknown","version":"consult Xen advisory XSA-510"}]}],"configurations":[{"lang":"en","value":"Xen versions 4.6 and later are vulnerable.  This is known to be the case\nwith the fix for XSA-491, but it's possible the issue can also be\ntriggered from other, non-analyzed paths.\n\nOnly x86 systems are vulnerable.  Arm systems are not vulnerable.\n\nOnly HVM guests with a PCI device with IO BARs assigned can leverage the\nvulnerability."}],"workarounds":[{"lang":"en","value":"There is no mitigation available."}],"credits":[{"lang":"en","type":"finder","value":"This issue was discovered by Jiqian Chen of AMD and diagnosed as a\nsecurity issue by Roger Pau Monné of AMD."}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-510.html"}],"providerMetadata":{"orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","shortName":"XEN","dateUpdated":"2026-09-08T12:11:08.534Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://xenbits.xen.org/xsa/advisory-510.html"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/08/7"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-09-08T17:08:32.715Z"}},{"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":"CHANGED","version":"3.1","baseScore":8.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-10T18:08:16.213605Z","id":"CVE-2026-79602","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":"2026-09-10T18:08:59.554Z"}}]}}