{"id":"CVE-2018-6556","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-6556","generatedAt":"2026-10-28T21:23:52.234Z","title":"lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path.","description":"lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.","published":"2018-08-10T15:29:01.000Z","lastModified":"2026-06-17T02:02:01.000Z","status":"Modified","sourceIdentifier":"security@ubuntu.com","cvss":{"version":"3.0","score":3.3,"severity":"LOW","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-417"],"affected":["canonical/ubuntu linux","linuxcontainers/lxc","suse/caas platform","suse/openstack cloud","suse/suse linux enterprise server","opensuse/leap"],"epss":{"score":0.00347,"percentile":0.2809,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html","tags":["Mailing List","Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html","tags":["Mailing List","Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html","tags":["Mailing List","Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html","source":"security@ubuntu.com"},{"url":"https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591","tags":["Issue Tracking","Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=988348","tags":["Issue Tracking","Patch"],"source":"security@ubuntu.com"},{"url":"https://security.gentoo.org/glsa/201808-02","tags":["Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"https://usn.ubuntu.com/usn/usn-3730-1","tags":["Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=988348","tags":["Issue Tracking","Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201808-02","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/usn/usn-3730-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-6556","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}