Arm Armv8-A core implementations utilizing speculative execution past unconditional changes in control flow may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka "straight-line speculation."
総合評価: CVE-2020-13844 は低リスク（36/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.50%、39 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて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 | 2026-06-15 | 0.08% | 0.50% | +0.43% |
| 2 | 2025-09-16 | 0.20% | 0.08% | -0.12% |
| 3 | 2025-03-30 | — | 0.20% | — |
EPSS の全履歴 （全 10 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 |
|---|---|---|---|---|---|---|
| 5.5 | 3.1 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| 2.1 | 2.0 | LOW |
|
3.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2020-13844 |
suse
|
medium | CVE-2020-13844 severity moderate: SUSE including 1757 source package names (0.0.17-1.1:libgcc_s1-10.2.1+git583-1.3.4, 0.0.17-1.1:libstdc++6-10.2.1+git583-1.3.4, …), 6916 product×package rows across 684 product lines (Container bci/bci-base-fips, Container bci/bci-init, … (684 product lines)): Fixed 5739, Known Not Affected 554, Will Not Fix 466, Known Affected 157. | https://www.suse.com/security/cve/CVE-2020-13844/ |
ubuntu
|
medium | CVE-2020-13844 medium priority: Ubuntu including 54 source packages (gcc-10, gcc-3.3, …), 918 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 626, ignored 119, deferred 89, needs-triage 52, not-affected 27, released 5. | https://ubuntu.com/security/CVE-2020-13844 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| arm | cortex-a32_firmware | — | cpe:2.3:o:arm:cortex-a32_firmware:-:*:*:*:*:*:*:* |
| arm | cortex-a35_firmware | — | cpe:2.3:o:arm:cortex-a35_firmware:-:*:*:*:*:*:*:* |
| arm | cortex-a53_firmware | — | cpe:2.3:o:arm:cortex-a53_firmware:-:*:*:*:*:*:*:* |
| arm | cortex-a57_firmware | — | cpe:2.3:o:arm:cortex-a57_firmware:-:*:*:*:*:*:*:* |
| arm | cortex-a72_firmware | — | cpe:2.3:o:arm:cortex-a72_firmware:-:*:*:*:*:*:*:* |
| arm | cortex-a73_firmware | — | cpe:2.3:o:arm:cortex-a73_firmware:-:*:*:*:*:*:*:* |
| arm | cortex-a34_firmware | — | cpe:2.3:o:arm:cortex-a34_firmware:-:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| opensuse | leap | 15.2 | cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://lists.llvm.org/pipermail/llvm-dev/2020-June/142109.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00039.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00040.html | Mailing List Third Party Advisory |
| https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability | Vendor Advisory |
| https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/downloads/straight-line-speculation | Vendor Advisory |
| https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/frequently-asked-questions | Vendor Advisory |
| https://gcc.gnu.org/pipermail/gcc-patches/2020-June/547520.html | Patch Third Party Advisory |