CVE-2024-31142 x86: Incorrect logic for BTC/SRSO mitigations

Because of a logical error in XSA-407 Branch Type Confusion, the mitigation is not applied properly when it is intended to be used. XSA-434 Speculative Return Stack Overflow uses the same infrastructure, so is equally impacted. For more details, see: https://xenbits.xen.org/xsa/advisory-407.html...

Fedora 40 : xen (2024-a46df5ba2f)

The remote Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-a46df5ba2f advisory. x86: Native Branch History Injection XSA-456, CVE-2024-2201 update to xen 4.18.2, remove patches now included upstream x86 HVM hypercalls may trigge...