nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive memory consumption. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.
総合評価: CVE-2018-16843 は中リスク(63.8/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 57.80%、98 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 | 2026-06-04 | 58.35% | 57.80% | -0.54% |
| 2 | 2026-05-26 | 56.10% | 58.35% | +2.25% |
| 3 | 2026-05-22 | — | 56.10% | — |
EPSS の全履歴 (全 60 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 | [email protected] |
| 5.3 | 3.0 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2018-16843: 1 source package rows (nginx); 15 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 5. | https://security.alpinelinux.org/vuln/CVE-2018-16843 |
debian
|
not yet assigned | CVE-2018-16843 not yet assigned priority: Debian including 1 source packages (nginx), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2018-16843 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2018-16843 |
suse
|
medium | CVE-2018-16843 severity moderate: SUSE including 24 source package names (nginx-1.0, nginx-1.14.2-16.1, …), 25 product×package rows across 13 product lines (SUSE Lifecycle Management Server 1.3, SUSE Linux Enterprise Module for Server Applications 15, … (13 product lines)): Fixed 23, Known Not Affected 2. | https://www.suse.com/security/cve/CVE-2018-16843/ |
ubuntu
|
medium | CVE-2018-16843 medium priority: Ubuntu including 1 source packages (nginx), 5 status rows across 5 suites (bionic, cosmic, trusty, upstream, xenial): released 4, not-affected 1. | https://ubuntu.com/security/CVE-2018-16843 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| f5 | nginx | > 1.9.5, < 1.14.1 | cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* |
| f5 | nginx | > 1.15.0, < 1.15.6 | cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 18.04 | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 18.10 | cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| apple | xcode | < 13.0 | cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html | Mailing List Third Party Advisory |
| http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html | Mailing List Vendor Advisory |
| http://seclists.org/fulldisclosure/2021/Sep/36 | Mailing List Third Party Advisory |
| http://www.securityfocus.com/bid/105868 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1042038 | Third Party Advisory VDB Entry |
| https://access.redhat.com/errata/RHSA-2018:3653 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2018:3680 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2018:3681 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16843 | Issue Tracking Third Party Advisory |
| https://support.apple.com/kb/HT212818 | Third Party Advisory |
| https://usn.ubuntu.com/3812-1/ | Third Party Advisory |
| https://www.debian.org/security/2018/dsa-4335 | Third Party Advisory |