{"cve":"CVE-2013-4361","nvd":{"published":"2013-10-01T17:55:03.570","modified":"2026-06-16T23:57:05.727","status":"Modified","description":"The fbld instruction emulation in Xen 3.3.x through 4.3.x does not use the correct variable for the source effective address, which allows local HVM guests to obtain hypervisor stack information by reading the values used by the instruction.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html","http://lists.opensuse.org/opensuse-updates/2013-11/msg00009.html","http://security.gentoo.org/glsa/glsa-201407-03.xml","http://www.debian.org/security/2014/dsa-3006","http://www.openwall.com/lists/oss-security/2013/09/30/3"],"products":["xen:xen"],"source":"nvd","synced_at":"2026-10-19T20:30:15.895642412+00:00"},"epss":{"cve":"CVE-2013-4361","score":0.00395,"percentile":0.33776,"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."]}