CVE-2018-14678

CVE-2018-14678 affects the Linux kernel up to 4.17.11 (and Xen up to 4.11.x). The xen_failsafe_callback entry in arch/x86/entry/entry_64.S does not properly preserve RBX, enabling local attackers to trigger uninitialized memory usage, causing a denial of service; 64-bit x86 PV Linux guests may cr...