GHSA-6f2p-2qg2-qqchPublished

KubeVirt downward metrics virtio-serial server vulnerable to unbounded memory consumption

Exact source revision recorded 4 Nov 2026 18:05:41 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

osv · GHSA-6f2p-2qg2-qqch

Published

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.

Source published: 26 Jun 2026 00:32:07 UTC
Source modified: 4 Nov 2026 17:30:04 UTC
Observed here: 4 Nov 2026 18:05:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

Publisher rating · LOW