xen is vulnerable to privilege escalation. The vulnerability exists through a data leak caused by an AMD IOMMU page-table entry that can be half-updated.
lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html
lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html
www.openwall.com/lists/oss-security/2021/01/19/9
xenbits.xen.org/xsa/advisory-347.html
lists.fedoraproject.org/archives/list/[email protected]/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
secdb.alpinelinux.org/v3.10/main.yaml
secdb.alpinelinux.org/v3.11/main.yaml
secdb.alpinelinux.org/v3.12/main.yaml
security.gentoo.org/glsa/202011-06
www.debian.org/security/2020/dsa-4804
xenbits.xen.org/xsa/advisory-347.html