CVE-2021-3559

Name: CVE-2021-3559
Creator: NVD / NIST
Published: 2021-05-24T12:15:07.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.03%

Last modified Jun 17, 2026

CVE-2021-3559 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A flaw was found in libvirt in the virConnectListAllNodeDevices API in versions before 7.0.0. It only affects hosts with a PCI device and driver that supports mediated devices (e.g., GRID driver). EPSS estimates a 1.03% chance of exploitation in the next 30 days.

Description

A flaw was found in libvirt in the virConnectListAllNodeDevices API in versions before 7.0.0. 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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.03%

59.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Redhat	Libvirt	>= 6.10.0, < 7.0.0
Netapp	Ontap Select Deploy Administration Utility	All versions

References

https://bugzilla.redhat.com/show_bug.cgi?id=1962306Issue Tracking, Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210706-0006/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1962306Issue Tracking, Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210706-0006/Third Party Advisory

Timeline

Published: May 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3559?

How severe is CVE-2021-3559?

CVE-2021-3559 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3559?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3559?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST