Red HatCVE-2026-102623
Red Hat OpenShift Virtualization 4: denial of service
Medium6.5CVE-2026-102623 · Published Sep 29, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat OpenShift Virtualization 4 Product | all versions | No fix yet |
| all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-476
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 29 | Red Hat libsoup.: buffer overflow | High8.6 | No fix yet |
| Sep 29 | Red Hat libsoup.: buffer overflow | High8.6 | No fix yet |
| Sep 29 | Red Hat libsoup.: buffer overflow | High8.6 | No fix yet |
| Sep 29 | Red Hat libsoup: out-of-bounds read | High8.2 | No fix yet |
| Sep 29 | Red Hat libsoup.: type confusion | High8.6 | No fix yet |
| Sep 29 | Red Hat libsoup.: out-of-bounds read | High8.6 | No fix yet |