{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "4.18"
              },
              {
                "last_affected": "5.6.11"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion.",
  "id": "CVE-2019-20794",
  "modified": "2026-03-15T21:49:38.965796149Z",
  "published": "2020-05-09T18:15:11.157Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security.netapp.com/advisory/ntap-20200608-0001/"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2020/08/24/1"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/sargun/fuse-example"
    },
    {
      "type": "EVIDENCE",
      "url": "https://sourceforge.net/p/fuse/mailman/message/36598753/"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}