View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2018-6954 medium priority: Ubuntu including 1 source packages (systemd), 6 status rows across 6 suites (artful, bionic, cosmic, trusty, upstream, xenial): released 3, ignored 1, needs-triage 1, not-affected 1.
systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, which allows local users to obtain ownership of arbitrary files via vectors involving creation of a directory and a file under that directory, and later replacing that directory with a symlink. This occurs even if the fs.protected_symlinks sysctl is turned on.