{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.20.0"
              },
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.21.0"
              },
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.21.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1374b26f6e94805b23d317831896716232c8454d"
            },
            {
              "introduced": "0"
            },
            {
              "last_affected": "6fd1545222f4f5e01dc3968da819276500296380"
            },
            {
              "introduced": "0"
            },
            {
              "last_affected": "047a379eb041f9ceae35df5fa072d88cac55340e"
            }
          ],
          "repo": "https://github.com/firecracker-microvm/firecracker",
          "type": "GIT"
        }
      ]
    }
  ],
  "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.",
  "id": "CVE-2020-16843",
  "modified": "2026-04-01T23:09:14.067580893Z",
  "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"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}