{"id":"USN-5226-1","summary":"systemd vulnerability","details":"It was discovered that systemd-tmpfiles employed uncontrolled recursion\nwhen removing deeply nested directory hierarchies. A local attacker could\nexploit this to cause systemd-tmpfiles to crash or have other unspecified\nimpacts.\n","modified":"2026-04-22T10:36:22.794516Z","published":"2022-01-13T00:43:02Z","related":["UBUNTU-CVE-2021-3997"],"upstream":["CVE-2021-3997","UBUNTU-CVE-2021-3997"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5226-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3997"}],"affected":[{"package":{"name":"systemd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/systemd@245.4-4ubuntu3.15?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"245.4-4ubuntu3.15"}]}],"versions":["242-7ubuntu3","243-2ubuntu1","243-3ubuntu1","244-3ubuntu1","244.1-0ubuntu2","244.1-0ubuntu3","244.2-1ubuntu1","244.3-1ubuntu1","245.2-1ubuntu1","245.2-1ubuntu2","245.4-2ubuntu1","245.4-4ubuntu1","245.4-4ubuntu3","245.4-4ubuntu3.1","245.4-4ubuntu3.2","245.4-4ubuntu3.3","245.4-4ubuntu3.4","245.4-4ubuntu3.5","245.4-4ubuntu3.6","245.4-4ubuntu3.7","245.4-4ubuntu3.10","245.4-4ubuntu3.11","245.4-4ubuntu3.13","245.4-4ubuntu3.14"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss-myhostname","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"libnss-mymachines","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"libnss-resolve","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"libnss-systemd","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"libpam-systemd","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"libsystemd0","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"libudev1","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"systemd","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"systemd-container","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"systemd-coredump","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"systemd-journal-remote","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"systemd-sysv","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"systemd-tests","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"systemd-timesyncd","binary_version":"245.4-4ubuntu3.15"},{"binary_name":"udev","binary_version":"245.4-4ubuntu3.15"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-3997","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5226-1.json"}}],"schema_version":"1.7.5"}