A mismatch caused by client-triggered server-sent stream resets between HTTP/2 specifications and the internal architectures of some HTTP/2 implementations may result in excessive server resource consumption leading to denial-of-service (DoS). By opening streams and then rapidly triggering the server to reset them—using malformed frames or flow control errors—an attacker can exploit incorrect stream accounting. Streams reset by the server are considered closed at the protocol level, even though backend processing continues. This allows a client to cause the server to handle an unbounded number of concurrent streams on a single connection. This CVE will be updated as affected product details are released.
総合評価: CVE-2025-8671 は中リスク（59.4/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 4.60%、90 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 | 2026-06-23 | 6.89% | 4.60% | -2.28% |
| 2 | 2026-06-15 | 3.27% | 6.89% | +3.61% |
| 3 | 2026-06-09 | — | 3.27% | — |
EPSS の全履歴 （全 16 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 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-8671: 3 source package rows (dnsdist, lighttpd, varnish); 9 state rows across 6 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-community, edge-main); fixed 9, open 0. | https://security.alpinelinux.org/vuln/CVE-2025-8671 |
debian
|
unimportant | CVE-2025-8671 unimportant priority: Debian including 3 source packages (h2o, haproxy, varnish), 12 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 8, open 4. | https://security-tracker.debian.org/tracker/CVE-2025-8671 |
redhat
|
— | — | https://access.redhat.com/security/cve/CVE-2025-8671 |
suse
|
high | CVE-2025-8671 severity important: SUSE including 23 source package names (dnsdist-1.9.11-150700.3.6.1, dnsdist-1.9.11-160000.1.1, …), 27 product×package rows across 7 product lines (SUSE Linux Enterprise High Availability Extension 12 SP5, SUSE Linux Enterprise Module for Basesystem 15 SP7, … (7 product lines)): Fixed 24, Known Not Affected 2, First Fixed 1. | https://www.suse.com/security/cve/CVE-2025-8671/ |
ubuntu
|
medium | CVE-2025-8671 medium priority: Ubuntu including 5 source packages (dnsdist, h2o, haproxy, lighttpd, varnish), 40 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): needs-triage 20, not-affected 12, ignored 3, released 3, DNE 1, needed 1. | https://ubuntu.com/security/CVE-2025-8671 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| データセットに影響を受ける製品はありません。 | |||