{"id":"EM-20261104-2ILS","url":"https://cyber.eventmonitor.net/incident/EM-20261104-2ILS/","type":"cve","title":"Firecracker Vulnerability (CVE-2026-122192)","subtitle":"CVE-2026-122192","subject":"CVE-2026-122192","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-04T21:47:44.000Z","firstSignal":"2026-11-04T20:19:12.210Z","lastSignal":"2026-11-04T21:47:44.000Z","updated":"2026-11-04T22:06:41.890Z","revision":1,"life":[{"status":"Born","at":"2026-11-04T21:47:44.000Z","why":"second independent source: C160 Reddit r/netsec"},{"status":"Developing","at":"2026-11-04T21:47:44.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T20:19:12.210Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-11-04T21:47:44.000Z","what":"Born: second source, C160 Reddit r/netsec. Page EM-20261104-2ILS created."}],"stages":[{"name":"Disclosed","at":"2026-11-04T20:19:12.210Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T20:19:12.210Z","detail":"CVSS 7.1"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T20:19:12.210Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-122192 (CVSS 7.1)","text":"Improper handling of a failed memory remap in Firecracker versions 0.23.0 through 1.16.1 might allow a guest user with root privileges to read or modify Firecracker VMM process memory via balloon or virtio-mem discard requests on microVMs restored from a snapshot with the File memory backend, if the host fails to create the replacement mapping.\n\n\n\nTo remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122192"},{"at":"2026-11-04T21:47:44.000Z","source":"C160","sourceName":"Reddit r/netsec","role":"Crowd","severity":1,"title":"Escaping AWS Firecracker from guest userspace: VMM memory corruption (CVE-2026-122192)","text":"We just published our research on escaping Firecracker microVMs, coordinated with AWS. The interesting part is how a guest can end up accessing memory belonging to the Firecracker process running outside the VM. The vulnerability: When a microVM is restored from a snapshot using the File memory backend, a failed memory remapping operation can leave KVM referencing a stale host virtual address rang","url":"https://www.reddit.com/r/netsec/comments/1xo0yov/escaping_aws_firecracker_from_guest_userspace_vmm/"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T20:19:12.210","score":7.1,"severity":"HIGH","desc":"Improper handling of a failed memory remap in Firecracker versions 0.23.0 through 1.16.1 might allow a guest user with root privileges to read or modify Firecracker VMM process memory via balloon or virtio-mem discard requests on microVMs restored from a snapshot with the File memory backend, if the","product":"","seen":1793830001890},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}