Bubblewrap (bwrap) before version 0.4.1, if installed in setuid mode and the kernel supports unprivileged user namespaces, then the `bwrap --userns2` option can be used to make the setuid process keep running as root while being traceable. This can in turn be used to gain root permissions. Note that this only affects the combination of bubblewrap in setuid mode (which is typically used when unprivileged user namespaces are not supported) and the support of unprivileged user namespaces. Known to be affected are: * Debian testing/unstable, if unprivileged user namespaces enabled (not default) * Debian buster-backports, if unprivileged user namespaces enabled (not default) * Arch if using `linux-hardened`, if unprivileged user namespaces enabled (not default) * Centos 7 flatpak COPR, if unprivileged user namespaces enabled (not default) This has been fixed in the 0.4.1 release, and all affected users should update.
総合評価: CVE-2020-5291 は中リスク（48.8/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.91%、55 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 2026-06-15 | 0.19% | 0.91% | +0.72% |
| 2 | 2025-11-21 | 0.07% | 0.19% | +0.12% |
| 3 | 2025-11-18 | — | 0.07% | — |
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 |
|---|---|---|---|---|---|---|
| 7.2 | 3.1 | HIGH |
|
0.8 | 5.8 | [email protected] |
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| 8.5 | 2.0 | HIGH |
|
6.8 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2020-5291: 1 source package rows (bubblewrap); 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 9, open 1. | https://security.alpinelinux.org/vuln/CVE-2020-5291 |
debian
|
low | CVE-2020-5291 low priority: Debian including 1 source packages (bubblewrap), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2020-5291 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2020-5291 |
suse
|
high | CVE-2020-5291 severity important: SUSE including 13 source package names (bubblewrap, bubblewrap-0.11.0-150500.3.9.1, …), 18 product×package rows across 12 product lines (SUSE Linux Enterprise Module for Basesystem 15 SP2, SUSE Linux Enterprise Module for Basesystem 15 SP3, … (12 product lines)): Fixed 16, Known Not Affected 2. | https://www.suse.com/security/cve/CVE-2020-5291/ |
ubuntu
|
low | CVE-2020-5291 low priority: Ubuntu including 1 source packages (bubblewrap), 7 status rows across 7 suites (bionic, eoan, focal, groovy, trusty, upstream, xenial): released 3, DNE 2, not-affected 2. | https://ubuntu.com/security/CVE-2020-5291 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| projectatomic | bubblewrap | < 0.4.1 | cpe:2.3:a:projectatomic:bubblewrap:*:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| archlinux | arch_linux | — | cpe:2.3:o:archlinux:arch_linux:-:*:*:*:*:*:*:* |
| centos | centos | 7.0 | cpe:2.3:o:centos:centos:7.0:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://github.com/containers/bubblewrap/commit/1f7e2ad948c051054b683461885a0215f1806240 | Patch Third Party Advisory |
| https://github.com/containers/bubblewrap/security/advisories/GHSA-j2qp-rvxj-43vj | Mitigation Third Party Advisory |