xen: various flaws (#1463247)
blkif responses leak backend stack data [XSA-216]
page transfer may allow PV guest to elevate privilege [XSA-217]
Races in the grant table unmap code [XSA-218]
x86: insufficient reference counts during shadow emulation [XSA-219]
x86: PKRU and BND* leakage between vCPU-s [XSA-220]
NULL pointer deref in event channel poll [XSA-221]
stale P2M mappings due to insufficient error checking [XSA-222]
ARM guest disabling interrupt may crash Xen [XSA-223]
grant table operations mishandle reference counts [XSA-224]
arm: vgic: Out-of-bound access when sending SGIs [XSA-225]