A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
総合評価: CVE-2025-26465 は中リスク（54.9/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 7.00%、93 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 61.22% | 7.00% | -54.23% |
| 2 | 2026-06-09 | 61.74% | 61.22% | -0.52% |
| 3 | 2026-06-06 | — | 61.74% | — |
EPSS の全履歴 （全 79 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 |
|---|---|---|---|---|---|---|
| 6.8 | 3.1 | MEDIUM |
|
1.6 | 5.2 | [email protected] |
| 6.8 | 3.1 | MEDIUM |
|
1.6 | 5.2 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-26465: 1 source package rows (openssh); 9 state rows across 6 repos (3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 2. | https://security.alpinelinux.org/vuln/CVE-2025-26465 |
debian
|
not yet assigned | CVE-2025-26465 not yet assigned priority: Debian including 1 source packages (openssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2025-26465 |
gentoo
|
normal | CVE-2025-26465: 1 GLSA(s) (202502-01), 1 atom(s) (net-misc/openssh); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2025-26465 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-26465 |
suse
|
medium | CVE-2025-26465 severity moderate: SUSE including 349 source package names (15.7.20.5.1:openssh-9.6p1-150600.6.15.2, 15.7.20.5.1:openssh-clients-9.6p1-150600.6.15.2, …), 1692 product×package rows across 344 product lines (Container suse/git, Container suse/hpc/warewulf4-x86_64/sle-hpc-node, … (344 product lines)): Fixed 1471, Known Affected 221. | https://www.suse.com/security/cve/CVE-2025-26465/ |
ubuntu
|
medium | CVE-2025-26465 medium priority: Ubuntu including 2 source packages (openssh, openssh-ssh1), 18 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 8, released 8, needs-triage 1, not-affected 1. | https://ubuntu.com/security/CVE-2025-26465 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openbsd | openssh | >= 6.9, <= 9.8 | cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* |
| openbsd | openssh | 6.8 | cpe:2.3:a:openbsd:openssh:6.8:p1:*:*:*:*:*:* |
| openbsd | openssh | 9.9 | cpe:2.3:a:openbsd:openssh:9.9:-:*:*:*:*:*:* |
| openbsd | openssh | 9.9 | cpe:2.3:a:openbsd:openssh:9.9:p1:*:*:*:*:*:* |
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* |
| netapp | ontap | 9 | cpe:2.3:a:netapp:ontap:9:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.0 | cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| debian | debian_linux | 12.0 | cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |