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      "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"
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