Upstream information
Description
KubeVirt is a virtual machine management add-on for Kubernetes. Versions 1.5.3 and below, and 1.6.0 contained a flawed implementation of the Kubernetes aggregation layer's authentication flow which could enable bypass of RBAC controls. It was discovered that the virt-api component fails to correctly authenticate the client when receiving API requests over mTLS. In particular, it fails to validate the CN (Common Name) field in the received client TLS certificates against the set of allowed values defined in the extension-apiserver-authentication configmap. Failre to validate certain fields in the client TLS certificate may allow an attacker to bypass existing RBAC controls by directly communicating with the aggregated API server, impersonating the Kubernetes API server and its aggregator component. This issue is fixed in versions 1.5.3 and 1.6.1.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 4.7 | 5.8 |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H |
| Attack Vector | Local | Local |
| Attack Complexity | High | High |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | Low |
| Integrity Impact | None | Low |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 5.8 |
| Vector | CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Local |
| Attack Complexity | High |
| Attack Requirements | None |
| Privileges Required | Low |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | Low |
| Vulnerable System Integrity Impact | Low |
| Vulnerable System Availability Impact | High |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 SP6 | kubevirt | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | kubevirt | Affected |
| SUSE Linux Enterprise Micro 5.3 | kubevirt | Affected |
| SUSE Linux Enterprise Micro 5.4 | kubevirt | Affected |
| SUSE Linux Enterprise Micro 5.5 | kubevirt | Affected |
| SUSE Linux Enterprise Module for Containers 15 SP6 | kubevirt | Affected |
| SUSE Linux Enterprise Module for Containers 15 SP7 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP6 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP7 | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | kubevirt | Affected |
| SUSE Linux Micro 6.0 | kubevirt | Affected |
| SUSE Linux Micro 6.1 | kubevirt | Affected |
| openSUSE Leap 15.6 | kubevirt | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | kubevirt | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | kubevirt | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | kubevirt | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | kubevirt | Affected |
| SUSE Linux Enterprise Module for Containers 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise Module for Containers 15 SP5 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP5 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | kubevirt | Affected |
| SUSE Manager Proxy 4.3 | kubevirt | Affected |
| SUSE Manager Retail Branch Server 4.3 | kubevirt | Affected |
| SUSE Manager Server 4.3 | kubevirt | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kubevirt | Affected |
| openSUSE Leap 15.4 | kubevirt | Affected |
| openSUSE Leap 15.5 | kubevirt | Affected |
| openSUSE Leap Micro 5.3 | kubevirt | Affected |
| openSUSE Leap Micro 5.4 | kubevirt | Affected |
| openSUSE Leap Micro 5.5 | kubevirt | Affected |
| Products at an unknown state of their lifecycle. | ||
| SUSE Linux Micro Extras 6.0 | kubevirt | Affected |
| SUSE Linux Micro Extras 6.1 | kubevirt | Affected |
SUSE Timeline for this CVE
CVE page created: Fri Nov 7 22:03:35 2025CVE page last modified: Mon Nov 10 12:43:29 2025