GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.
総合評価: CVE-2020-15705 は中リスク（50/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 1.45%、70 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 | 2026-06-19 | 1.53% | 1.45% | -0.08% |
| 2 | 2026-06-15 | 0.03% | 1.53% | +1.50% |
| 3 | 2025-11-21 | — | 0.03% | — |
EPSS の全履歴 （全 15 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 |
|---|---|---|---|---|---|---|
| 6.4 | 3.1 | MEDIUM |
|
0.5 | 5.9 | [email protected] |
| 6.4 | 3.1 | MEDIUM |
|
0.5 | 5.9 | [email protected] |
| 4.4 | 2.0 | MEDIUM |
|
3.4 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
medium | CVE-2020-15705: 1 source package rows (grub); 7 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 0. | https://security.alpinelinux.org/vuln/CVE-2020-15705 |
debian
|
unimportant | CVE-2020-15705 unimportant priority: Debian including 1 source packages (grub2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2020-15705 |
gentoo
|
normal | CVE-2020-15705: 1 GLSA(s) (202104-05), 1 atom(s) (sys-devel/grub); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-15705 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2020-15705 |
suse
|
high | CVE-2020-15705 severity important: SUSE including 433 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 660 product×package rows across 75 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-Azure-BYOS, … (75 product lines)): Fixed 503, Known Affected 157. | https://www.suse.com/security/cve/CVE-2020-15705/ |
ubuntu
|
medium | CVE-2020-15705 medium priority: Ubuntu including 3 source packages (grub2, grub2-signed, grub2-unsigned), 44 status rows across 16 suites (bionic, eoan, focal, groovy, hirsute, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 30, released 8, needs-triage 3, DNE 1, ignored 1, needed 1. | https://ubuntu.com/security/CVE-2020-15705 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| gnu | grub2 | <= 2.04 | cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* |
| redhat | enterprise_linux_atomic_host | — | cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.0 | cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 18.04 | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 20.04 | cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| opensuse | leap | 15.2 | cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| suse | suse_linux_enterprise_server | 11 | cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:* |
| suse | suse_linux_enterprise_server | 12 | cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:* |
| suse | suse_linux_enterprise_server | 15 | cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:* |
| microsoft | windows_10 | — | cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1607 | cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1709 | cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1803 | cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1809 | cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1903 | cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1909 | cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* |
| microsoft | windows_10 | 2004 | cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* |
| microsoft | windows_8.1 | — | cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* |
| microsoft | windows_rt_8.1 | — | cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2012 | — | cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2012 | r2 | cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | — | cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | 1903 | cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | 1909 | cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | 2004 | cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* |
| microsoft | windows_server_2019 | — | cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* |