Cnv: dos through repeatedly calling vm-dump-metrics until virt handler crashes

published 2024-04-03 2 y ago modified 2026-09-10 1 mo ago also GHSA-vjhf-6xfr-5p9g , GO-2024-2688 , EUVD-2024-1311

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

A NULL pointer dereference flaw was found in KubeVirt. This flaw allows an attacker who has access to a virtual machine guest on a node with DownwardMetrics enabled to cause a denial of service by issuing a high number of calls to vm-dump-metrics --virtio and then deleting the virtual machine.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-31420 updated 2025-11-21 cvss 6.5

cnv: DoS through repeatedly calling vm-dump-metrics until virt handler crashes

Red Hat OpenShift Virtualization 4 kubevirt
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-04-08)

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
go	kubevirt.io/kubevirt	<=1.2.0 all versions	no fix listed

Affected products

Red Hat Red Hat OpenShift Virtualization 4

Classification

Weakness

CWE-476 NULL Pointer Dereference

References

access.redhat.com /security/cve/CVE-2024-31420
vdb-entry, web
bugzilla.redhat.com /show_bug.cgi?id=2272951
issue-tracking, web
nvd.nist.gov /vuln/detail/CVE-2024-31420
advisory
github.com /kubevirt/kubevirt
package
github.com /advisories/GHSA-vjhf-6xfr-5p9g
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary