RHSA-2021:3477: Important: RHV-H security update (redhat-virtualization-host) 4.3.18

The redhat-virtualization-host packages provide the Red Hat Virtualization Host.These packages include redhat-release-virtualization-host. Red HatVirtualization Hosts (RHVH) are installed using a special build of Red HatEnterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources andperforming administrative tasks.Security Fix(es): sssd: shell command injection in sssctl (CVE-2021-3621) kernel: use-after-free in route4change() in net/sched/clsroute.c (CVE-2021-3715) kernel: out-of-bounds write in xtcompattargetfromuser() in net/netfilter/xtables.c (CVE-2021-22555) libX11: missing request length checks (CVE-2021-31535) kernel: race condition for removal of the HCI controller (CVE-2021-32399) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.