{"id":"GHSA-6f2p-2qg2-qqch","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.","aliases":["CVE-2026-13322"],"modified":"2026-11-04T17:30:04.822633018Z","published":"2026-06-26T00:32:07Z","database_specific":{"severity":"LOW","github_reviewed":true,"github_reviewed_at":"2026-11-04T17:16:06Z","nvd_published_at":"2026-06-26T00:16:51Z","cwe_ids":["CWE-770"]},"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"}],"affected":[{"package":{"name":"github.com/kubevirt/kubevirt","ecosystem":"Go","purl":"pkg:golang/github.com/kubevirt/kubevirt"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.1.0-alpha.0"},{"last_affected":"1.10.0-rc.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-6f2p-2qg2-qqch/GHSA-6f2p-2qg2-qqch.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L"}]}