{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79607","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","state":"PUBLISHED","assignerShortName":"XEN","dateReserved":"2026-08-25T07:35:05.289Z","datePublished":"2026-10-13T15:43:43.425Z","dateUpdated":"2026-10-16T18:36:50.515Z"},"containers":{"cna":{"title":"Xenstore: Guests can crash xenstored during Live Update","datePublic":"2026-10-13T12:00:00.000Z","descriptions":[{"lang":"en","value":"During Xenstore live update the state record for a Xenstore watch with\nspecified watch depth is written with two bytes missing.  This results\nin an inconsistent state when reading the state back in the new Xenstore,\ncausing a crash of Xenstore or wrong Xenstore data."}],"impacts":[{"descriptions":[{"lang":"en","value":"An unprivileged guest can cause the Xenstore service to crash or to get\ncorrupted during a live update of Xenstore, causing a DoS of the host\nregarding further domain administration actions."}]}],"affected":[{"defaultStatus":"unknown","product":"Xen","vendor":"Xen","versions":[{"status":"unknown","version":"consult Xen advisory XSA-514"}]}],"configurations":[{"lang":"en","value":"Only systems running Xen 4.22 are vulnerable.  Systems running Xen 4.21\nor older are not vulnerable.\n\nOnly systems running C xenstore either as daemon or as stubdom are\nvulnerable. Systems running oxenstored are not vulnerable."}],"workarounds":[{"lang":"en","value":"Not doing a live update of Xenstore avoids the vulnerability.\n\nSwitching to oxenstored avoids the vulnerability."}],"credits":[{"lang":"en","type":"finder","value":"This issue was discovered by Andrii Sultanov of Vates."}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-514.html"}],"providerMetadata":{"orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","shortName":"XEN","dateUpdated":"2026-10-13T15:43:43.425Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://xenbits.xen.org/xsa/advisory-514.html"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/13/3"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-10-13T16:13:38.746Z"}},{"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":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-15T18:01:08.421555Z","id":"CVE-2026-79607","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2026-10-16T18:36:50.515Z"}}]}}