Upstream information
Description
A flaw was found in KubeVirt's network annotation generator. When a tenant creates a VirtualMachineInstance with a Multus network configuration, the supplied networkName value is written verbatim into the launcher pod's v1.multus-cni.io/default-network annotation without format validation or sanitization. The only admission check rejects empty strings; no DNS-1123 format validation, JSON detection, or special character rejection is performed. When the ExternalNetResourceInjection Beta feature gate is enabled (off by default, cluster-admin only), the NAD lookup that would otherwise catch malformed names is skipped by design. A tenant with kubevirt.io:edit permissions can inject a JSON-formatted NetworkSelectionElement array specifying an arbitrary namespace, NAD name, static IP address, and MAC address. Multus on the node parses this JSON and attaches the launcher pod to the specified network attachment in any namespace, enabling cross-namespace network access and IP/MAC impersonation on network segments normally segregated from tenant workloads. The ExternalNetResourceInjection feature gate was introduced in KubeVirt v1.8.0 (first shipped in OpenShift Virtualization 4.21).SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (Red Hat) |
|---|---|
| Base Score | 4.9 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Changed |
| Confidentiality Impact | Low |
| Integrity Impact | Low |
| Availability Impact | None |
| CVSSv3 Version | 3.1 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP7 | kubevirt | Not affected |
| SUSE Linux Enterprise Micro 5.3 | kubevirt | Not affected |
| SUSE Linux Enterprise Micro 5.4 | kubevirt | Not affected |
| SUSE Linux Enterprise Micro 5.5 | kubevirt | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP7 | kubevirt | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | kubevirt | Not affected |
| SUSE Linux Enterprise Server 16.0 | kubevirt | Not affected |
| SUSE Linux Enterprise Server 16.1 | kubevirt | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | kubevirt | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | kubevirt | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | kubevirt | Not affected |
| SUSE Linux Micro 6.0 | kubevirt | Not affected |
| SUSE Linux Micro 6.1 | kubevirt | Not affected |
| SUSE Linux Micro 6.2 | kubevirt | Not affected |
| openSUSE Leap 16.0 | kubevirt | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | kubevirt | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | kubevirt | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP4 | kubevirt | Not affected |
| SUSE Linux Enterprise Module for Containers 15 SP5 | kubevirt | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | kubevirt | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | kubevirt | Not affected |
| SUSE Manager Proxy 4.3 | kubevirt | Not affected |
| SUSE Manager Retail Branch Server 4.3 | kubevirt | Not affected |
| SUSE Manager Server 4.3 | kubevirt | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kubevirt | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kubevirt | Not affected |
| openSUSE Leap 15.4 | kubevirt | Not affected |
| openSUSE Leap 15.5 | kubevirt | Not affected |
| openSUSE Leap Micro 5.3 | kubevirt | Not affected |
| openSUSE Leap Micro 5.4 | kubevirt | Not affected |
| openSUSE Leap Micro 5.5 | kubevirt | Not affected |
| Products at an unknown state of their lifecycle. | ||
| SUSE Linux Micro Extras 6.0 | kubevirt | Not affected |
| SUSE Linux Micro Extras 6.1 | kubevirt | Not affected |
| SUSE Linux Micro Extras 6.2 | kubevirt | Not affected |
SUSE Timeline for this CVE
CVE page created: Fri Jun 26 20:14:00 2026CVE page last modified: Mon Jun 29 11:32:11 2026