CVE catalog

CVE-2018-6556

lxc: CVE-2018-6556

Severity: Medium · CVSS 5.5CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Published: Jul 11, 2018, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.35% · Oct 27, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	lxc	sid	`1:7.0.0-2`	fixed
Debian	lxc	forky	`1:7.0.0-2`	fixed
Debian	lxc	trixie	`1:6.0.4-4+deb13u4`	fixed
Debian	lxc	bookworm	`1:5.0.2-1+deb12u4`	fixed
Alpine	lxc	3.10	`2.1.1-r9`	fixed
Alpine	lxc	3.11	`2.1.1-r9`	fixed
Alpine	lxc	3.12	`2.1.1-r9`	fixed
Alpine	lxc	3.13	`2.1.1-r9`	fixed
Alpine	lxc	3.14	`2.1.1-r9`	fixed
Alpine	lxc	3.15	`2.1.1-r9`	fixed
Alpine	lxc	3.16	`2.1.1-r9`	fixed
Alpine	lxc	3.17	`2.1.1-r9`	fixed
Alpine	lxc	3.18	`2.1.1-r9`	fixed
Alpine	lxc	3.19	`2.1.1-r9`	fixed
Alpine	lxc	3.20	`2.1.1-r9`	fixed
Alpine	lxc	3.21	`2.1.1-r9`	fixed
Alpine	lxc	3.22	`2.1.1-r9`	fixed
Alpine	lxc	3.23	`2.1.1-r9`	fixed
Alpine	lxc	3.24	`2.1.1-r9`	fixed
Alpine	lxc	3.6	`2.0.9-r1`	fixed
Alpine	lxc	3.7	`2.1.1-r3`	fixed
Alpine	lxc	3.8	`2.1.1-r9`	fixed
Alpine	lxc	3.9	`2.1.1-r9`	fixed
Ubuntu	lxc	18.04	`2.1.0-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`2.1.1-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta1-0ubuntu3`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta2-0ubuntu2`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta3-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta4-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0-0ubuntu2`	vulnerable
Ubuntu	lxc	18.04	`3.0.1-0ubuntu1~18.04.1`	vulnerable
Ubuntu	lxc	18.04	`3.0.1-0ubuntu1~18.04.2`	fixed
Ubuntu	lxc	18.04	`2.1.0-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`2.1.1-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta1-0ubuntu3`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta2-0ubuntu2`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta3-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0~beta4-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0-0ubuntu1`	vulnerable
Ubuntu	lxc	18.04	`3.0.0-0ubuntu2`	vulnerable
Ubuntu	lxc	18.04	`3.0.1-0ubuntu1~18.04.1`	vulnerable
Ubuntu	lxc	18.04	`3.0.1-0ubuntu1~18.04.2`	fixed
Suse	lxc	package hub 15	`3.1.0-bp150.5.3.1`	fixed
Suse	lxcfs	package hub 15	`3.0.3-bp150.3.3.1`	fixed
Opensuse	lxc	leap 15.0	`3.1.0-lp150.2.10.1`	fixed
Opensuse	lxcfs	leap 15.0	`3.0.3-lp150.2.3.1`	fixed
Suse	lxc	package hub 15	`2.0.9-bp150.5.6.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	lxc	source	sid	`1:2.0.9-6.1`	not yet assigned	Not reported	[905586]
Debian	lxc	source	forky	`1:2.0.9-6.1`	not yet assigned	Not reported	[905586]
Debian	lxc	source	trixie	`1:2.0.9-6.1`	not yet assigned	Not reported	[905586]
Debian	lxc	source	bookworm	`1:2.0.9-6.1`	not yet assigned	Not reported	[905586]
Alpine	lxc	apk	3.10	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.11	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.12	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.13	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.14	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.15	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.16	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.17	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.18	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.19	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.20	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.21	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.22	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.23	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.24	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.6	`2.0.9-r1`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.7	`2.1.1-r3`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.8	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Alpine	lxc	apk	3.9	`2.1.1-r9`	Not reported	ALPINE-CVE-2018-6556	Not reported
Ubuntu	lxc	deb	18.04	`3.0.1-0ubuntu1~18.04.2`	Not reported	UBUNTU-CVE-2018-6556	Not reported
Ubuntu	lxc	deb	18.04	`3.0.1-0ubuntu1~18.04.2`	Not reported	USN-3730-1	Not reported
Suse	lxc	rpm	package hub 15	`3.1.0-bp150.5.3.1`	Not reported	OPENSUSE-SU-2019:1227-1	Not reported
Suse	lxcfs	rpm	package hub 15	`3.0.3-bp150.3.3.1`	Not reported	OPENSUSE-SU-2019:1227-1	Not reported
Opensuse	lxc	rpm	leap 15.0	`3.1.0-lp150.2.10.1`	Not reported	OPENSUSE-SU-2019:1275-1	Not reported
Opensuse	lxcfs	rpm	leap 15.0	`3.0.3-lp150.2.3.1`	Not reported	OPENSUSE-SU-2019:1275-1	Not reported
Suse	lxc	rpm	package hub 15	`2.0.9-bp150.5.6.1`	Not reported	OPENSUSE-SU-2019:1230-1	Not reported

[Debian bug #905586]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[liblxc1]Fixed
Source package: [lxc]
Details (2)
- 1:5.0.2-1+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
- 1:5.0.2-1+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
[liblxc-common]Fixed
Source package: [lxc]
Details (2)
- 1:5.0.2-1+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
- 1:5.0.2-1+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
[libpam-cgfs]Fixed
Source package: [lxc]
Details (2)
- 1:5.0.2-1+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
- 1:5.0.2-1+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
[lxc]Fixed
Details (2)
- 1:5.0.2-1+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
- 1:5.0.2-1+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
[lxc-dev]Fixed
Source package: [lxc]
Details (2)
- 1:5.0.2-1+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
- 1:5.0.2-1+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
[lxc-tests]Fixed
Source package: [lxc]
Details (2)
- 1:5.0.2-1+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12
- 1:5.0.2-1+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · bookworm; dsa · lxc · debian · 12

[Debian 13 (Trixie)]

[liblxc1t64]Fixed
Source package: [lxc]
Details (2)
- 1:6.0.4-4+deb13u3+b1 · amd64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
- 1:6.0.4-4+deb13u3+b1 · arm64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
[liblxc-common]Fixed
Source package: [lxc]
Details (2)
- 1:6.0.4-4+deb13u3+b1 · amd64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
- 1:6.0.4-4+deb13u3+b1 · arm64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
[libpam-cgfs]Fixed
Source package: [lxc]
Details (2)
- 1:6.0.4-4+deb13u3+b1 · amd64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
- 1:6.0.4-4+deb13u3+b1 · arm64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
[lxc]Fixed
Source package: [lxc]
Details (2)
- 1:6.0.4-4+deb13u3+b1 · amd64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
- 1:6.0.4-4+deb13u3+b1 · arm64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
[lxc-dev]Fixed
Source package: [lxc]
Details (2)
- 1:6.0.4-4+deb13u3+b1 · amd64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
- 1:6.0.4-4+deb13u3+b1 · arm64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
[lxc-tests]Fixed
Source package: [lxc]
Details (2)
- 1:6.0.4-4+deb13u3+b1 · amd64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13
- 1:6.0.4-4+deb13u3+b1 · arm64 · trixie
  Fixed · Fixed: 1:2.0.9-6.1
  dsa · lxc · debian · 13

Observed: Oct 23, 2026, 5:37:33 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]