"value":"Because of a logical error in XSA-407 (Branch Type Confusion), the\nmitigation is not applied properly when it is intended to be used.\nXSA-434 (Speculative Return Stack Overflow) uses the same\ninfrastructure, so is equally impacted.\n\nFor more details, see:\n https://xenbits.xen.org/xsa/advisory-407.html\n https://xenbits.xen.org/xsa/advisory-434.html\n"