xen is vulnerable to information disclosure. The vulnerability exists as a guest is allowed to control whether memory accesses are bypassing the cache.
xenbits.xen.org/xsa/advisory-364.html
lists.fedoraproject.org/archives/list/[email protected]/message/4GELN5E6MDR5KQBJF5M5COUUED3YFZTD/
lists.fedoraproject.org/archives/list/[email protected]/message/EOAJBVAVR6RSCUCHNXPVSNRPSFM7INMP/
secdb.alpinelinux.org/v3.11/main.yaml
secdb.alpinelinux.org/v3.12/main.yaml
secdb.alpinelinux.org/v3.13/main.yaml
www.debian.org/security/2021/dsa-4888