CVE-2021-4147: Fedoraproject Fedora

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition.

Affected products

• Fedoraproject Fedora: version 35 only
• Netapp Ontap Select Deploy Administration Utility: affected versions not specified
• Red Hat Libvirt: before 2.33.0 (fixed in 2.33.0)

Published 2022-03-25. Last modified 2026-06-17.