Is CVE-2026-13322 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-13322 being exploited in the wild.

How severe is CVE-2026-13322?

Low severity, with a CVSS score of 3.8, published 26 June 2026.

Which products and versions are affected?

github.com/kubevirt/kubevirt (Go) >= 1.1.0-alpha.0, <= 1.10.0-rc.0, SEMVER:introduced=1.1.0-alpha.0,last_affected=1.10.0-rc.0; kubevirt.io/kubevirt (Go) SEMVER:introduced=1.1.0-alpha.0; KubeVirt unspecified.

Is there a fix for CVE-2026-13322?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-13322 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-13322?

Check whether you run github.com/kubevirt/kubevirt (Go), kubevirt.io/kubevirt (Go) or KubeVirt at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-13322: KubeVirt unbounded memory allocation in virt-handler virtio-serial server

Q: Is there a fix for CVE-2026-13322?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-13322 attacked?

It is attacked with local access, in a software library.

Q: Am I affected by CVE-2026-13322?

Check whether you run github.com/kubevirt/kubevirt (Go), kubevirt.io/kubevirt (Go) or KubeVirt at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-13322 · Severity: low · CVSS 3.8 · Published 2026-06-26

A denial-of-service vulnerability exists in KubeVirt, a tool used to run virtual machines within Kubernetes clusters. An attacker with access to a guest virtual machine can send a continuous stream of data to a specific internal service, causing the host management process to consume all available memory. This results in the management service being terminated by the operating system, potentially disrupting the management of all virtual machines on that specific host.

Technologies: kubevirt.io/kubevirt (Go), KubeVirt. Vendors: Go, KubeVirt.

Quick answers

Is CVE-2026-13322 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-13322 being exploited in the wild.
How severe is CVE-2026-13322?: Low severity, with a CVSS score of 3.8, published 26 June 2026.
Which products and versions are affected?: github.com/kubevirt/kubevirt (Go) >= 1.1.0-alpha.0, <= 1.10.0-rc.0, SEMVER:introduced=1.1.0-alpha.0,last_affected=1.10.0-rc.0; kubevirt.io/kubevirt (Go) SEMVER:introduced=1.1.0-alpha.0; KubeVirt unspecified.
Is there a fix for CVE-2026-13322?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-13322 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-13322?: Check whether you run github.com/kubevirt/kubevirt (Go), kubevirt.io/kubevirt (Go) or KubeVirt at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability was identified in KubeVirt's downward metrics virtio-serial server within the virt-handler component. The server utilizes 'textproto.Reader.ReadLine()' to process guest requests, which lacks a length limit or read deadline, causing it to buffer input indefinitely until a newline character is encountered. An attacker with local access to a VM guest configured with the downward metrics virtio-serial device can transmit a continuous byte stream without newlines. This leads to unbounded heap allocation in the virt-handler process, eventually triggering an Out-of-Memory (OOM) kill. Because virt-handler manages multiple VMs on a node, this impacts the availability of management services for the entire host.

Affected products

KubeVirt KubeVirt unspecified
Red Hat OpenShift Virtualization 4 4

Identifiers

CVE-2026-13322
GHSA-6f2p-2qg2-qqch
GO-2026-6912

Timeline

2026-06-25: disclosed: Initial report in Red Hat Bugzilla
2026-06-26: advisory: NVD publication date

References

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