A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.
総合評価: CVE-2021-3623 は低リスク（32.4/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.31%、22 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 | 0.05% | 0.31% | +0.26% |
| 2 | 2025-12-16 | 0.04% | 0.05% | +0.01% |
| 3 | 2025-11-21 | — | 0.04% | — |
EPSS の全履歴 （全 9 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 |
|---|---|---|---|---|---|---|
| 6.1 | 3.1 | MEDIUM |
|
1.8 | 4.2 | [email protected] |
| 3.6 | 2.0 | LOW |
|
3.9 | 4.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2021-3623 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-2021-3623 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-3623 |
suse
|
medium | CVE-2021-3623 severity moderate: SUSE including 11 source package names (0.58.0.20.46:libtpms0-0.8.2-150300.3.6.1, libtpms-devel-0.8.2-150300.3.6.1, …), 27 product×package rows across 19 product lines (Container suse/sles/15.5/virt-launcher, SUSE Linux Enterprise Micro 5.1, … (19 product lines)): Fixed 27. | https://www.suse.com/security/cve/CVE-2021-3623/ |
ubuntu
|
medium | CVE-2021-3623 medium priority: Ubuntu including 1 source packages (libtpms), 9 status rows across 9 suites (bionic, focal, groovy, hirsute, impish, jammy, trusty, upstream, xenial): ignored 4, DNE 3, not-affected 1, released 1. | https://ubuntu.com/security/CVE-2021-3623 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libtpms_project | libtpms | < 0.6.5 | cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* |
| libtpms_project | libtpms | >= 0.7.0, < 0.7.8 | cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* |
| libtpms_project | libtpms | >= 0.8.0, < 0.8.4 | cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1976806 | Issue Tracking Patch Third Party Advisory |
| https://github.com/stefanberger/libtpms/commit/2e6173c | Patch Third Party Advisory |
| https://github.com/stefanberger/libtpms/commit/2f30d62 | Patch Third Party Advisory |
| https://github.com/stefanberger/libtpms/commit/7981d9a | Patch Third Party Advisory |
| https://github.com/stefanberger/libtpms/pull/223 | Issue Tracking Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/ |