CVE-2017-17566, XSA-248: x86 PV guests may gain access to internally used pages Reference: CVE-2017-17563, XSA-249: broken x86 shadow mode refcount overflow check Reference: CVE-2017-17564, XSA-250: improper x86 shadow mode refcount error handling Reference: CVE-2017-17565, XSA-251: improper bug check in x86 log-dirty handling Reference: CVE-2017-5753, CVE-2017-5715, CVE-2017-5754, XSA-254: Inform ...