{"schemaVersion":3,"id":"CVE-2020-16843","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2020-08-04T19:39:04.000Z","modified":"2024-08-04T13:45:33.240Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.9,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01674,"percentile":0.76467,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.01674},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01674,"percentile":0.76467}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01674,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01674,"percentile":0.76467}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"amazon","product":"firecracker","name":"firecracker","label":"firecracker","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"0.20.0","noFixRecorded":false,"fixedIn":null},{"text":"0.21.0","noFixRecorded":false,"fixedIn":null},{"text":"0.21.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"0.20.0 | 0.21.0 | 0.21.1","eol":null,"hubHref":"/vendor/amazon/firecracker"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/firecracker-microvm/firecracker/issues/2057","label":"github.com/firecracker-microvm/firecracker/issues/2057","hostname":"github.com","tags":["X Refsource MISC","Mitigation","Third Party Advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2020/08/13/1","label":"www.openwall.com/lists/oss-security/2020/08/13/1","hostname":"www.openwall.com","tags":["X Refsource MISC","Mailing List","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2020/08/13/1","label":"www.openwall.com/lists/oss-security/2020/08/13/1","hostname":"www.openwall.com","tags":["Mailing List","X Refsource MLIST","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-08-04T19:39:04.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T13:45:33.240Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":24,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T08:21:54.147Z","stale":false,"partial":false}}