A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with the SSH_OK code, resulting in libssh not properly detecting the error returned by the OpenSSL library. This issue can lead to undefined behavior, including compromised data confidentiality and integrity or crashes.
総合評価: CVE-2025-5987 は中リスク（57/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 1.44%、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 | 2026-06-15 | 1.23% | 1.44% | +0.21% |
| 2 | 2026-05-26 | 1.49% | 1.23% | -0.26% |
| 3 | 2026-05-23 | — | 1.49% | — |
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 |
|---|---|---|---|---|---|---|
| 8.1 | 3.1 | HIGH |
|
2.2 | 5.9 | [email protected] |
| 8.1 | 3.1 | HIGH |
|
2.2 | 5.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-5987: 1 source package rows (libssh); 6 state rows across 2 repos (3.22-community, edge-community); fixed 2, open 4. | https://security.alpinelinux.org/vuln/CVE-2025-5987 |
debian
|
unimportant | CVE-2025-5987 unimportant priority: Debian including 1 source packages (libssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2025-5987 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-5987 |
suse
|
medium | CVE-2025-5987 severity moderate: SUSE including 259 source package names (2.2.1-5.14:libssh-config-0.10.6-slfo.1.1_2.1, 2.2.1-5.14:libssh4-0.10.6-slfo.1.1_2.1, …), 462 product×package rows across 79 product lines (Container suse/sl-micro/6.1/baremetal-os-container, Container suse/sl-micro/6.1/base-os-container, … (79 product lines)): Known Affected 231, Known Not Affected 135, Fixed 96. | https://www.suse.com/security/cve/CVE-2025-5987/ |
ubuntu
|
medium | CVE-2025-5987 medium priority: Ubuntu including 1 source packages (libssh), 8 status rows across 8 suites (bionic, focal, jammy, noble, oracular, plucky, upstream, xenial): not-affected 4, released 4. | https://ubuntu.com/security/CVE-2025-5987 |