{"id":"CVE-2020-16843","details":"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.","modified":"2026-04-10T04:23:38.692261Z","published":"2020-08-04T20:15:12.430Z","references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/08/13/1"},{"type":"ADVISORY","url":"https://www.openwall.com/lists/oss-security/2020/08/13/1"},{"type":"REPORT","url":"https://github.com/firecracker-microvm/firecracker/issues/2057"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/firecracker-microvm/firecracker","events":[{"introduced":"0"},{"last_affected":"1374b26f6e94805b23d317831896716232c8454d"},{"introduced":"0"},{"last_affected":"6fd1545222f4f5e01dc3968da819276500296380"},{"introduced":"0"},{"last_affected":"047a379eb041f9ceae35df5fa072d88cac55340e"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"0.20.0"},{"introduced":"0"},{"last_affected":"0.21.0"},{"introduced":"0"},{"last_affected":"0.21.1"}]}}],"versions":["v0.1.0","v0.1.1","v0.10.0","v0.10.1","v0.11.0","v0.12.0","v0.13.0","v0.14.0","v0.15.0","v0.16.0","v0.17.0","v0.18.0","v0.19.0","v0.2.0","v0.20.0","v0.21.0","v0.21.1","v0.3.0","v0.4.0","v0.5.0","v0.6.0","v0.7.0","v0.8.0","v0.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-16843.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}