CVE-2018-6556
lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path.
Does this matter?
Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 3.3 LOWCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.35% probability · 28th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-417
- Affected
- canonical/ubuntu linux · linuxcontainers/lxc · suse/caas platform · suse/openstack cloud · suse/suse linux enterprise server · opensuse/leap
- Source
- security@ubuntu.com
EPSS 0.3% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=988348Issue Tracking, Patch
- https://security.gentoo.org/glsa/201808-02Third Party Advisory
- https://usn.ubuntu.com/usn/usn-3730-1Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=988348Issue Tracking, Patch
- https://security.gentoo.org/glsa/201808-02Third Party Advisory
- https://usn.ubuntu.com/usn/usn-3730-1Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.