{"id":"CVE-2026-79610","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-79610","generatedAt":"2026-10-28T06:35:16.244Z","title":"XSA-501 was about issues with v1 -> v2 and v2 -> v1 changes racing certain other grant table operations.","description":"XSA-501 was about issues with v1 -> v2 and v2 -> v1 changes racing certain\nother grant table operations.  Sadly a v2 -> v1 -> v2 change has yet\nanother effect which wasn't accounted for: During the first change, status\npages would be freed.  During the second change they would be allocated\nagain.  Hence across the full pair of change the addresses of the status\npages may change, rendering stale previously calculated pointers into the\nstatus array.","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":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-362"],"affected":[],"epss":{"score":0.00148,"percentile":0.03931,"date":"2026-10-27","history":[{"date":"2026-10-14","score":0.0018,"percentile":0.0708}]},"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 (0.15%). 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":"8.8","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 8.8 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-13T16:17:23.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-13T16:17:23.247Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-517.html","source":"security@xen.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/13/6","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xenbits.xen.org/xsa/advisory-517.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-79610","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."}