A xen security update has been released for Debian GNU/Linux 10 to address multiple vulnerabilities in the Xen hypervisor, which could result in denial of service, guest-to-host privilege escalation or information leaks.

DSA 4723-1: xen security update

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Debian Security Advisory DSA-4723-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
July 12, 2020   https://www.debian.org/security/faq
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Package : xen
CVE ID : CVE-2020-11739 CVE-2020-11740 CVE-2020-11741 CVE-2020-11742
CVE-2020-11743 CVE-2020-15563 CVE-2020-15564 CVE-2020-15565
CVE-2020-15566 CVE-2020-15567

Multiple vulnerabilities have been discovered in the Xen hypervisor,
which could result in denial of service, guest-to-host privilege
escalation or information leaks.

For the stable distribution (buster), these problems have been fixed in
version 4.11.4+24-gddaaccbbab-1~deb10u1.

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/