{"id":"CVE-2026-13322","aliases":["GO-2026-6912"],"url":"https://o3.security/vulnerability/CVE-2026-13322","summary":"KubeVirt downward metrics virtio-serial server vulnerable to unbounded memory consumption","details":"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.","published":"2026-06-26T00:32:07Z","modified":"2026-11-05T23:26:13.939585920Z","cvss":{"score":3.8,"severity":"LOW","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"},"epss":{"score":0.00094,"percentile":0.00721,"asOf":"2026-07-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/kubevirt/kubevirt","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13322"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-13322"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492681"},{"type":"PACKAGE","url":"https://github.com/kubevirt/kubevirt"},{"type":"WEB","url":"https://github.com/kubevirt/kubevirt/blob/e63503d2f3a166f79f0891f8e1c3450eb39f88ac/pkg/downwardmetrics/virtio-serial/server.go#L240-L251"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-05T23:26:13.939585920Z"}}