CVE-2026-102623
Kubevirt: kubevirt: virt-controller nil-pointer dereference via malformed ephemeral volume
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-476 |
| Vendor | red hat |
| Product | red hat openshift virtualization 4 |
| Published | Sep 29, 2026 |
Stay Ahead of the Next One
Get instant alerts for red hat red hat openshift virtualization 4
Be the first to know when new medium vulnerabilities affecting red hat red hat openshift virtualization 4 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat OpenShift Virtualization 4
All versions affected Red Hat / Red Hat OpenShift Virtualization 4
All versions affected References
Credits
Red Hat would like to thank Arpit Jain for reporting this issue.