Multiple vulnerabilities have been discovered in the Xen hypervisor, which
could result in privilege escalation. In addition this updates provides
mitigations for the Retbleed speculative execution attack and the
MMIO stale data vulnerabilities.
For additional information please refer to the following pages:
<https://xenbits.xen.org/xsa/advisory-404.html>
<https://xenbits.xen.org/xsa/advisory-407.html>
For the stable distribution (bullseye), these problems have been fixed in
version 4.14.5+24-g87d90d511c-1.
We recommend that you upgrade your xen packages.
For the detailed security status of xen please refer to
its security tracker page at:
[\
https://security-tracker.debian.org/tracker/xen](https://security-tracker.debian.org/tracker/xen)
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xen - security update
