Block, net, and SCSI backends consider certain errors a plain bug, deliberately causing a kernel crash. For errors potentially being at least under the influence of guests, like out of memory conditions, it isn't correct to assume so. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode, though. External References: https://xenbits.xen.org/xsa/advisory-362.html
Created xen tracking bugs for this issue: Affects: fedora-all [bug 1929551]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.