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.
総合評価: CVE-2018-6556 は低リスク（19.4/100）。CVSS 深刻度は低。悪用される可能性が高い（EPSS 0.06%、18 パーセンタイル） 推奨対応: 総合リスクは低く緊急対応は不要です。通常の保守サイクルでパッチを適用し、CVSS / EPSS が上昇したら優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-01-23 | 0.04% | 0.06% | +0.01% |
| 2 | 2025-11-21 | 0.08% | 0.04% | -0.03% |
| 3 | 2025-11-18 | — | 0.08% | — |
EPSS の全履歴 （全 11 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 3.3 | 3.0 | LOW |
|
1.8 | 1.4 | [email protected] |
| 2.1 | 2.0 | LOW |
|
3.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
low | CVE-2018-6556: 1 source package rows (lxc); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. | https://security.alpinelinux.org/vuln/CVE-2018-6556 |
debian
|
not yet assigned | CVE-2018-6556 not yet assigned priority: Debian including 1 source packages (lxc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2018-6556 |
gentoo
|
low | CVE-2018-6556: 1 GLSA(s) (201808-02), 1 atom(s) (app-emulation/lxc); latest impact low. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-6556 |
suse
|
medium | CVE-2018-6556 severity moderate: SUSE including 22 source package names (liblxc-devel-3.1.0-bp150.5.3.1, liblxc-devel-3.1.0-lp150.2.10.1, …), 62 product×package rows across 34 product lines (SUSE CaaS Platform 4.0, SUSE CaaS Platform 4.5, … (34 product lines)): Known Not Affected 43, Fixed 19. | https://www.suse.com/security/cve/CVE-2018-6556/ |
ubuntu
|
medium | CVE-2018-6556 medium priority: Ubuntu including 1 source packages (lxc), 4 status rows across 4 suites (bionic, trusty, upstream, xenial): not-affected 2, needs-triage 1, released 1. | https://ubuntu.com/security/CVE-2018-6556 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| canonical | ubuntu_linux | 18.04 | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| linuxcontainers | lxc | >= 2.0.0, <= 2.0.9 | cpe:2.3:a:linuxcontainers:lxc:*:*:*:*:*:*:*:* |
| linuxcontainers | lxc | >= 3.0.0, < 3.0.2 | cpe:2.3:a:linuxcontainers:lxc:*:*:*:*:*:*:*:* |
| suse | caas_platform | 1.0 | cpe:2.3:a:suse:caas_platform:1.0:*:*:*:*:*:*:* |
| suse | caas_platform | 2.0 | cpe:2.3:a:suse:caas_platform:2.0:*:*:*:*:*:*:* |
| suse | openstack_cloud | 6 | cpe:2.3:a:suse:openstack_cloud:6:*:*:*:*:*:*:* |
| suse | suse_linux_enterprise_server | 11 | cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:ltss:*:*:* |
| suse | suse_linux_enterprise_server | 11 | cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp4:*:*:*:*:*:* |
| opensuse | leap | 15.0 | cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html | |
| https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591 | Issue Tracking Third Party Advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=988348 | Issue Tracking Patch |
| https://security.gentoo.org/glsa/201808-02 | Third Party Advisory |
| https://usn.ubuntu.com/usn/usn-3730-1 | Third Party Advisory |