{"id":"EM-20261112-L6XD","url":"https://cyber.eventmonitor.net/incident/EM-20261112-L6XD/openshift-sandboxed-containers-vulnerability-cve-2026-121876/","type":"cve","title":"OpenShift Sandboxed Containers Vulnerability (CVE-2026-121876)","subtitle":"CVE-2026-121876","subject":"CVE-2026-121876","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-12T17:17:29.040Z","firstSignal":"2026-11-12T14:00:00.000Z","lastSignal":"2026-11-12T17:17:29.040Z","updated":"2026-11-13T00:40:17.050Z","revision":1,"life":[{"status":"Born","at":"2026-11-12T17:17:29.040Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-12T17:17:29.040Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-12T14:00:00.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-12T17:17:29.040Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261112-L6XD created."}],"stages":[{"name":"Disclosed","at":"2026-11-12T17:17:29.040Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-12T17:17:29.040Z","detail":"CVSS 7.9"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-12T14:00:00.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-12T14:00:00.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-121876 (important)","text":"sandboxed-containers: kernel: systemd-gpt-auto-generator: Guest Data Leakage in Confidential Computing (Sandboxed Containers)","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-121876.json"},{"at":"2026-11-12T17:17:29.040Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-121876 (CVSS 7.9)","text":"A flaw was found in the interaction between systemd-gpt-auto-generator and \nconfidential computing guest VM images in OpenShift Sandboxed Containers \n(confidential peer pods). systemd-gpt-auto-generator automatically discovers \nand mounts GPT partitions by type GUID at boot with no user confirmation. In \nthe confidential computing threat model, where the host/hypervisor is the \nadversary, a malicious host can inject partitions into the guest's virtual \ndisk. Most critically, injecting a swap partition causes the guest kernel to \npage out TEE-encrypted memory to a host-controlled block…","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121876"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-12T17:17:29.040","score":7.9,"severity":"HIGH","desc":"A flaw was found in the interaction between systemd-gpt-auto-generator and \nconfidential computing guest VM images in OpenShift Sandboxed Containers \n(confidential peer pods). systemd-gpt-auto-generator automatically discovers \nand mounts GPT partitions by type GUID at boot with no user…","product":"","seen":1794514998570},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}