{"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": "2026-10-13T16:13:38.746Z"}, "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"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "Xen", "vendor": "Xen", "versions": [{"status": "unknown", "version": "consult Xen advisory XSA-514"}]}], "source": "security@xen.org"}], "cveTags": [], "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."}], "id": "CVE-2026-79607", "lastModified": "2026-10-13T17:17:46.570", "metrics": {}, "published": "2026-10-13T16:17:22.937", "references": [{"source": "security@xen.org", "url": "https://xenbits.xenproject.org/xsa/advisory-514.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/13/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://xenbits.xen.org/xsa/advisory-514.html"}], "sourceIdentifier": "security@xen.org", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "consult Xen advisory XSA-514"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Xen", "source": "cna", "vendor": "Xen"}, "product": "xen", "vendor": "xen"}], "created": "2026-10-13T20:00:16.153706+00:00", "updated": "2026-10-13T20:15:14.043066+00:00", "vendors": ["xen", "xen$PRODUCT$xen"], "weaknesses": ["CWE-125", "CWE-770"]}