CVE-2021-3559
libvirt: nodedev-list command may cause libvirt to crash on hosts with GRID driver installed
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 2, 2020
Updated · June 28, 2026
Description
A flaw was found in libvirt in the virConnectListAllNodeDevices API. It only affects hosts with a PCI device and driver that supports mediated devices (e.g., GRID driver). This flaw could be used by an unprivileged client with a read-only connection to crash the libvirt daemon by executing the 'nodedev-list' virsh command. The highest threat from this vulnerability is to system availability.
Statement
The versions of libvirt as shipped with Red Hat Enterprise Linux 6, 7, 8, and Red Hat Enterprise Linux Advanced Virtualization 8 are not affected by this issue, as they did not include the vulnerable code, which was introduced in a later version of the package (libvirt-v6.10.0).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer