{"id":"CVE-2020-16843","aliases":["EUVD-2020-8804","GHSA-mq2v-3xvx-978w"],"status":"published","title":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under...","description":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01674,"percentile":0.77149,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-08-04T19:39:04Z","modified":"2026-10-20T10:51:59Z","products":[{"vendor":"amazon","product":"firecracker"}],"references":[{"url":"https://github.com/firecracker-microvm/firecracker/issues/2057","tags":["x_refsource_MISC","x_transferred","Mitigation","Third Party Advisory","report"]},{"url":"https://www.openwall.com/lists/oss-security/2020/08/13/1","tags":["x_refsource_MISC","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2020/08/13/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-16843"},{"url":"https://github.com/advisories/GHSA-mq2v-3xvx-978w"}],"sources":{"cve":[{"id":"CVE-2020-16843","description":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.","status":"published","published":"2020-08-04T19:39:04Z","modified":"2024-08-04T13:45:33.24Z","updated_at":"2026-11-02T14:35:59.116379Z"}],"euvd":[{"id":"EUVD-2020-8804","description":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.","status":"published","published":"2020-08-04T19:39:04Z","modified":"2024-08-04T13:45:33Z","updated_at":"2026-11-03T03:07:28.222143Z"}],"ghsa":[{"id":"GHSA-mq2v-3xvx-978w","title":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under...","description":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.","status":"published","published":"2022-05-24T17:24:56Z","modified":"2023-01-29T05:03:28Z","updated_at":"2026-11-02T14:45:19.492424Z"}],"nvd":[{"id":"CVE-2020-16843","description":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.","status":"published","published":"2020-08-04T20:15:12.43Z","modified":"2026-06-17T02:58:07.547Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:10.994748Z"}],"osv":[{"id":"CVE-2020-16843","description":"In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.","status":"published","published":"2020-08-04T20:15:12.43Z","modified":"2026-10-20T10:51:59.854972376Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:14.828228Z"}]}}