{"id":"CVE-2026-13322","aliases":["GHSA-6f2p-2qg2-qqch"],"title":"KubeVirt downward metrics virtio-serial server vulnerable to unbounded memory consumption","summary":"KubeVirt downward metrics virtio-serial server vulnerable to unbounded memory consumption","severity":"low","cvss":3.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L","vendor":"kubevirt","product":"github.com/kubevirt/kubevirt","ecosystem":"go","affected":["github.com/kubevirt/kubevirt >= 1.1.0-alpha.0, <= 1.10.0-rc.0"],"published":"2026-06-26","updated":"2026-11-04","sourceUpdated":"2026-11-04T17:30:04.822633018Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-6f2p-2qg2-qqch","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13322"},{"url":"https://access.redhat.com/security/cve/CVE-2026-13322"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492681"},{"url":"https://github.com/kubevirt/kubevirt"},{"url":"https://github.com/kubevirt/kubevirt/blob/e63503d2f3a166f79f0891f8e1c3450eb39f88ac/pkg/downwardmetrics/virtio-serial/server.go#L240-L251"},{"url":"https://github.com/advisories/GHSA-6f2p-2qg2-qqch"}],"tags":["osv","go","ghsa"],"epss":0.00134,"epssPercentile":0.02955,"cwe":["CWE-770"],"ingestedAt":"2026-11-04T17:19:45.133Z","slug":"CVE-2026-13322","body":"## Overview\n\nA 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.\n\n## Affected packages\n\n- `github.com/kubevirt/kubevirt >= 1.1.0-alpha.0, <= 1.10.0-rc.0`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"sunlit","depthScore":21,"depthScoreParts":{"impact":20.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}