{"id":"CVE-2026-79611","revision":"5dd182f1a4d1432f9a5ceb22e957b6be","records":[{"revision":"5dd182f1a4d1432f9a5ceb22e957b6be","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-79611","aliases":[],"title":"VMX: VMentry failure with branch tracing and blocked states","description":"For XSA-308 logic was introduced, as VMX VMEntry checks do not like the\nexact combination of state which occurs when #DB in intercepted, Single\nStepping is active, and blocked by STI/MovSS is active, despite this being\na legitimate state to be in.  The resulting VMEntry failure is fatal to\nthe guest.\n\nSadly there is another special sub-case of the above, with branch tracing\nenabled.  In that case the prior adjustment would still cause a VMentry\nfailure, as before fatal to the guest.","state":0,"publishedAt":"2026-10-13T15:44:56.361+00:00","modifiedAt":"2026-10-20T17:31:41.971+00:00","affected":[{"ecosystem":"Vendor product","name":"Xen","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unknown\",\n                    \"product\": \"Xen\",\n                    \"vendor\": \"Xen\",\n                    \"versions\": [\n                        {\n                            \"status\": \"unknown\",\n                            \"version\": \"consult Xen advisory XSA-518\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://xenbits.xenproject.org/xsa/advisory-518.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-79611","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-79611","identifiers":["CVE-2026-79611"]},"retained":false,"historicalAffected":[]}],"coverage":[]}