xen is vulnerable to denial of service (DoS). The vulnerability exists through a NULL pointer dereference causing a crash in xenstored.
lists.fedoraproject.org/archives/list/[email protected]/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
lists.fedoraproject.org/archives/list/[email protected]/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
secdb.alpinelinux.org/v3.12/main.yaml
www.debian.org/security/2020/dsa-4812
xenbits.xenproject.org/xsa/advisory-324.txt