{"id":"CVE-2026-102702","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102702","generatedAt":"2026-10-27T22:46:48.203Z","title":"[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] 1) XSA-437 (CVE-2023-34321) addressed issues with overflows in calculations involved in guests flushing caches through…","description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\n1) XSA-437 (CVE-2023-34321) addressed issues with overflows in\n   calculations involved in guests flushing caches through\n   GNTTABOP_cache_flush.  Unfortunately the fix there introduced a\n   calculation which may underflow, resulting in a loop which would - at\n   least on 64-bit Arm - take excessively long, and which would likely\n   eventually crash the hypervisor.\n\n   This is CVE-2026-102699.\n\n2) GNTTABOP_cache_flush may be issued on memory mapped from another\n   domain using the grant table interface.  However there was no\n   restriction to disallow the use of invalidate-without-clean against\n   read-only grant mappings, which may corrupt the granted memory.\n\n   This is CVE-2026-102702.","published":"2026-10-13T16:17:10.000Z","lastModified":"2026-10-20T18:17:16.000Z","status":"Awaiting Analysis","sourceIdentifier":"security@xen.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-191"],"affected":[],"epss":{"score":0.00292,"percentile":0.21537,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00146,"percentile":0.0347}]},"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 (0.29%). 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":"7.5","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.5 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-13T16:17:10.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-13T16:17:09.723Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-519.html","source":"security@xen.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102702","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."}