PT-2026-52638 · Red Hat · Red Hat Openshift Virtualization 4

Huzaifa Sidhpurwala · Published 2026-06-26 · Updated 2026-06-26 · CVE-2026-13322

NVD

CVSS v3.1

3.8

Low

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

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.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-13322

Affected Products

Red Hat Openshift Virtualization 4

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-13322 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2492681 · Note
• https://access.redhat.com/security/cve/CVE-2026-13322 · Note