CVE-2026-79603

{"id": "CVE-2026-79603", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-79603", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-08T13:42:37.092287Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@xen.org", "affectedData": [{"vendor": "Xen", "product": "Xen", "versions": [{"status": "unknown", "version": "consult Xen advisory XSA-511"}], "defaultStatus": "unknown"}]}], "published": "2026-09-08T13:17:27.253", "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-511.html", "source": "security@xen.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/09/08/8", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://xenbits.xen.org/xsa/advisory-511.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-664"}]}], "descriptions": [{"lang": "en", "value": "x86 PV guests can free memory pages while still keeping a stale TLB entry\npointing to them. A TLB flush is only issued by Xen (if needed) when the\npage is re-used. Since it's possible for the page to be scrubbed ahead of\nthe TLB flush, there's a window where a PV guest can modify an already\nscrubbed page."}], "lastModified": "2026-09-08T19:20:25.117", "sourceIdentifier": "security@xen.org"}