CVE-2026-102623
Kubevirt: kubevirt: virt-controller nil-pointer dereference via malformed ephemeral volume
- State
- Published
- Severity
- 6.5 Medium
- Published
- Sep 29, 2026
- Updated
- Sep 29, 2026
- Reserved
- Sep 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
Red Hat OpenShift Virtualization 4Red Hat | |
Red Hat OpenShift Virtualization 4Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-102623vdb-entry
- RHBZ#2543219issue-tracking
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