Xen through 4.8.x allows local x86 PV guest OS kernel administrators to cause a denial of service (host hang or crash) by modifying the instruction stream asynchronously while performing certain kernel operations.
Exploitability
AV:LAC:LPR:HUI:NScope
S:CImpact
C:NI:NA:H6/CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H