A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package, whose signature header was modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity, confidentiality, and system availability.
総合評価: CVE-2021-20271 は中リスク（47/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.83%、53 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 | 0.15% | 0.83% | +0.67% |
| 2 | 2025-12-13 | 0.15% | 0.15% | +0.01% |
| 3 | 2025-11-21 | — | 0.15% | — |
EPSS の全履歴 （全 17 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 |
|---|---|---|---|---|---|---|
| 7.0 | 3.1 | HIGH |
|
1.0 | 5.9 | [email protected] |
| 5.1 | 2.0 | MEDIUM |
|
4.9 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2021-20271: 1 source package rows (rpm); 32 state rows across 8 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, 3.23-community, edge-community); fixed 32, open 0. | https://security.alpinelinux.org/vuln/CVE-2021-20271 |
debian
|
not yet assigned | CVE-2021-20271 not yet assigned priority: Debian including 1 source packages (rpm), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-20271 |
gentoo
|
normal | CVE-2021-20271: 1 GLSA(s) (202107-43), 1 atom(s) (app-arch/rpm); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-20271 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-20271 |
suse
|
low | CVE-2021-20271 severity low: SUSE including 410 source package names (0.21.0.3.2.10:rpm-ndb-4.14.3-37.2, 0.7.1-rev1.0.0-build2.2.1:python3-rpm-4.14.3-37.2, …), 704 product×package rows across 201 product lines (Container bci/bci-init, Container bci/bci-minimal, … (201 product lines)): Fixed 410, Known Affected 231, Will Not Fix 63. | https://www.suse.com/security/cve/CVE-2021-20271/ |
ubuntu
|
low | CVE-2021-20271 low priority: Ubuntu including 1 source packages (rpm), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 8, released 4, ignored 3, needed 1. | https://ubuntu.com/security/CVE-2021-20271 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| rpm | rpm | >= 4.15.0, < 4.15.1.3 | cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:* |
| rpm | rpm | >= 4.16.0, < 4.16.1.3 | cpe:2.3:a:rpm:rpm:*:*:*:*:*:*:*:* |
| rpm | rpm | 4.15.0 | cpe:2.3:a:rpm:rpm:4.15.0:alpha:*:*:*:*:*:* |
| rpm | rpm | 4.15.0 | cpe:2.3:a:rpm:rpm:4.15.0:beta1:*:*:*:*:*:* |
| rpm | rpm | 4.15.0 | cpe:2.3:a:rpm:rpm:4.15.0:rc1:*:*:*:*:*:* |
| rpm | rpm | 4.16.0 | cpe:2.3:a:rpm:rpm:4.16.0:alpha:*:*:*:*:*:* |
| rpm | rpm | 4.16.0 | cpe:2.3:a:rpm:rpm:4.16.0:beta2:*:*:*:*:*:* |
| rpm | rpm | 4.16.0 | cpe:2.3:a:rpm:rpm:4.16.0:beta3:*:*:*:*:*:* |
| rpm | rpm | 4.16.0 | cpe:2.3:a:rpm:rpm:4.16.0:rc1:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 32 | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
| starwindsoftware | starwind_virtual_san | v8 | cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14398:*:*:*:*:*:* |