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Kubevirt: kubevirt: virt-controller nil-pointer dereference via malformed ephemeral volume

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-102623

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-102623

Red Hat OpenShift Virtualization 4

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat OpenShift Virtualization 4

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "cpes": [
      "cpe:/a:redhat:container_native_virtualization:4"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Virtualization 4",
    "packageName": "container-native-virtualization/virt-controller",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:container_native_virtualization:4"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Virtualization 4",
    "packageName": "container-native-virtualization/virt-controller-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-102623

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#3995 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement