Description
A flaw was found in KubeVirt. An authenticated user with permission to create Virtual Machine Instances (VMIs) can cause a Denial of Service (DoS) by submitting a virtual machine definition with an empty ephemeral volume. The virt-controller component fails to properly validate the volume configuration, leading to an unhandled exception and application crash during processing. Because the malformed definition persists in the cluster, the controller enters a continuous crash loop, disrupting virtual machine lifecycle operations across the entire environment.
Published: 2026-09-29
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

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History

Wed, 30 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Kubevirt
Kubevirt kubevirt
Vendors & Products Kubevirt
Kubevirt kubevirt

Wed, 30 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 29 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 29 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in KubeVirt. An authenticated user with permission to create Virtual Machine Instances (VMIs) can cause a Denial of Service (DoS) by submitting a virtual machine definition with an empty ephemeral volume. The virt-controller component fails to properly validate the volume configuration, leading to an unhandled exception and application crash during processing. Because the malformed definition persists in the cluster, the controller enters a continuous crash loop, disrupting virtual machine lifecycle operations across the entire environment.
Title Kubevirt: kubevirt: virt-controller nil-pointer dereference via malformed ephemeral volume
First Time appeared Redhat
Redhat container Native Virtualization
Weaknesses CWE-476
CPEs cpe:/a:redhat:container_native_virtualization:4
Vendors & Products Redhat
Redhat container Native Virtualization
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Kubevirt Kubevirt
Redhat Container Native Virtualization
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-29T19:51:25.376Z

Reserved: 2026-09-29T14:35:37.210Z

Link: CVE-2026-102623

cve-icon Vulnrichment

Updated: 2026-09-29T19:51:15.534Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T17:17:06.843

Modified: 2026-09-29T21:29:07.663

Link: CVE-2026-102623

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-29T00:00:00Z

Links: CVE-2026-102623 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T16:30:12Z

Weaknesses