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Advisory severityHigh8.5Vendor: MediumRed Hat Linux

High [CVE-2026-13325] DisableTLS migration setting removes authentication, exposing unauthenticated virtqemud proxy on all interfaces

This high-severity Red Hat Linux advisory covers CVE-2026-13325.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-13325 Source published Source updated

VulniPulse record published Record updated

CVE-2026-13325
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

A flaw was found in KubeVirt's migration proxy. When spec.configuration.migrations.disableTLS is set to true on the KubeVirt custom resource, the target virt-handler binds a plain TCP listener on all interfaces (0.0.0.0/::) on a random port with no authentication, peer allow-list, or handshake token.

This listener proxies directly into the target virt-launcher's virtqemud control socket. An attacker with a running pod on the cluster network can connect to this listener and issue unfiltered libvirt RPC commands against another tenant's virtual machine, including reading VM memory and configuration, modifying VM state via QMP, or destroying the VM.

The bind address is unconditionally 0.0.0.0 — configuring a dedicated migration network via migrations.network only changes the advertised migration IP, not the listener bind address, so the port remains reachable on the pod network even when a dedicated migration network is configured.

The API documentation describes disableTLS as removing "the additional layer of live migration encryption" without disclosing that it also removes all mutual authentication. This CVE has been marked as Rejected by the assigning CNA.

Red Hat severity: Moderate — CVSS 8.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H). Weakness: CWE-306.

Red Hat lists Red Hat OpenShift Virtualization 4 as not affected.

Is CVE-2026-13325 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-13325 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-13325?

The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · medium-confidence parse· fetched 13 days ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.

Official advisory · medium-confidence parse· fetched 13 days ago·verify at source

Mitigation

The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.

Official advisory · medium-confidence parse· fetched 13 days ago·verify at source

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