{"id":"CVE-2026-79608","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-79608","generatedAt":"2026-10-28T03:58:03.056Z","title":"The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later re-worked to better integrate with other manipulations of the same MSR.","description":"The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later\nre-worked to better integrate with other manipulations of the same MSR.\nIn this rework an inverted conditional was introduced, resulting in the\nworkaround to not be applied when needed and vice versa.\n\nFor more details, see:\n  http://xenbits.xen.org/xsa/advisory-433.html","published":"2026-10-13T16:17:23.000Z","lastModified":"2026-10-20T18:17:22.000Z","status":"Awaiting Analysis","sourceIdentifier":"security@xen.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-670"],"affected":[],"epss":{"score":0.0035,"percentile":0.28439,"date":"2026-10-27","history":[{"date":"2026-10-14","score":0.00159,"percentile":0.04546}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-20T19:15:07.000Z","detail":{"from":null,"score":"9.8","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.8 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-10-13T16:17:23.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-13T16:17:23.040Z"},"summary":"New CVE, critical severity (CVSS 9.8)."}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-515.html","source":"security@xen.org"},{"url":"http://xenbits.xen.org/xsa/advisory-515.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-79608","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}