A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.
総合評価: CVE-2021-3746 は中リスク(45.9/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.90%、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% | 0.90% | +0.71% |
| 2 | 2025-11-21 | 0.27% | 0.19% | -0.08% |
| 3 | 2025-11-18 | — | 0.27% | — |
EPSS の全履歴 (全 13 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 |
|---|---|---|---|---|---|---|
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | [email protected] |
| 7.1 | 2.0 | HIGH |
|
8.6 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2021-3746 not yet assigned priority: Debian including 1 source packages (libtpms), 4 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 4. | https://security-tracker.debian.org/tracker/CVE-2021-3746 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-3746 |
suse
|
high | CVE-2021-3746 severity important: SUSE including 14 source package names (0.45.0.8.14.1:libtpms0-0.8.2-3.3.1, 0.49.0.18.8:libtpms0-0.8.2-3.3.1, …), 24 product×package rows across 18 product lines (Container suse/sles/15.3/virt-launcher, Container suse/sles/15.4/virt-launcher, … (18 product lines)): Fixed 24. | https://www.suse.com/security/cve/CVE-2021-3746/ |
ubuntu
|
medium | CVE-2021-3746 medium priority: Ubuntu including 1 source packages (libtpms), 6 status rows across 6 suites (hirsute, impish, jammy, trusty, upstream, xenial): ignored 4, not-affected 1, released 1. | https://ubuntu.com/security/CVE-2021-3746 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libtpms_project | libtpms | >= 0.6.0, < 0.6.6 | cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* |
| libtpms_project | libtpms | >= 0.7.0, < 0.7.9 | cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* |
| libtpms_project | libtpms | >= 0.8.0, < 0.8.5 | cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* |
| URL | タグ |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1998588 | Issue Tracking Patch Third Party Advisory |