{"cve":"CVE-2026-23554","nvd":{"published":"2026-03-23T07:16:07.200","modified":"2026-06-17T10:21:46.330","status":"Analyzed","description":"The Intel EPT paging code uses an optimization to defer flushing of any cached\nEPT state until the p2m lock is dropped, so that multiple modifications done\nunder the same locked region only issue a single flush.\n\nFreeing of paging structures however is not deferred until the flushing is\ndone, and can result in freed pages transiently being present in cached state.\nSuch stale entries can point to memory ranges not owned by the guest, thus\nallowing access to unintended memory regions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":7.8},"cwes":["CWE-367"],"references":["https://xenbits.xenproject.org/xsa/advisory-480.html","http://www.openwall.com/lists/oss-security/2026/03/17/6","http://xenbits.xen.org/xsa/advisory-480.html"],"products":["xen:xen"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-23554","score":0.0013,"percentile":0.02605,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}