{"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"}}]}}

{}

{"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": "2026-10-16T19:17:43.780", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-79607", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T18:01:08.421555Z", "version": "2.0.3"}}]}, "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": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}