CVE-2026-13322
Low
Description
A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest requests using textproto.Reader.ReadLine(), which buffers input indefinitely until a newline character is received, with no length limit or read deadline. A user with access to a VM guest that has the downward metrics virtio-serial device configured can write a continuous byte stream to the device, causing unbounded memory allocation in the virt-handler process until it is OOM-killed.
SeverityLow
CVSS3.8
Exploit probability—
Product
Kubevirt
PublishedJun 26, 2026
First seenJun 26, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kubevirt kubevirt | No range specified | — |
| redhat openshift_virtualization | 4 ≤ v ≤ 4.22.0 | — |
| github.com/kubevirt/kubevirtGo | 1.1.0-alpha.0 ≤ v ≤ 1.10.0-rc.0 | — |
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