CVE-2026-13322

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.

CVSS v3 3.8 LOW

3.8^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.0 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-13322	Mitigation Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2492681	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*

History

No history.

Information

Published : 2026-06-26 00:16

Updated : 2026-07-06 17:25

NVD link : CVE-2026-13322

Mitre link : CVE-2026-13322

CVE.ORG link : CVE-2026-13322

JSON object : View

Products Affected

kubevirt

kubevirt

redhat

openshift_virtualization

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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