{"id":"CVE-2026-79611","published":"2026-10-13T16:17:23.347","lastModified":"2026-10-14T16:10:14.750","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-518.html","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/13/7","tags":[]},{"url":"http://xenbits.xen.org/xsa/advisory-518.html","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}