{"id":"CVE-2026-62435","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-62435","generatedAt":"2026-10-28T02:23:52.773Z","title":"[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] With the introduction of Grant Table v2 came the requirement to be able to switch between versions.","description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nWith the introduction of Grant Table v2 came the requirement to be able to\nswitch between versions.  Switching from v1 to v2 reduces the number of\nvalid grant references, as a bigger shared entry structure is then needed\nwhile the shared table doesn't change size.  Switching from v2 back to v1\nthe status frames, which are separate in v2, go away.\n\nCode holding, but intermediately dropping and then re-acquiring the grant\ntable lock, sometimes wrongly assumes that said properties wouldn't change\nacross the window in time where the lock is not being held.\n\nThe v1 -> v2 issue is CVE-2026-62435.\n\nThe v2 -> v1 issue is CVE-2026-62436.","published":"2026-07-28T13:19:02.000Z","lastModified":"2026-07-28T16:19:41.000Z","status":"Deferred","sourceIdentifier":"security@xen.org","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"},"cwe":["CWE-362"],"affected":[],"epss":{"score":0.00188,"percentile":0.08337,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.19%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-501.html","source":"security@xen.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-62435","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."}