The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size.
総合評価: CVE-2018-5391 は中リスク（64.6/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 24.57%、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 | 2026-06-24 | 24.15% | 24.57% | +0.43% |
| 2 | 2026-06-15 | 4.26% | 24.15% | +19.89% |
| 3 | 2026-05-15 | — | 4.26% | — |
EPSS の全履歴 （全 33 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] |
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2018-5391 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2018-5391 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2018-5391 |
suse
|
medium | CVE-2018-5391 severity moderate: SUSE including 256 source package names (bpftool-3.10.0-957.el7, cluster-md-kmp-azure-4.12.14-5.13.1, …), 480 product×package rows across 62 product lines (SLES for SAP Applications 11 SP3, SUSE CaaS Platform 3.0, … (62 product lines)): Fixed 441, Known Not Affected 39. | https://www.suse.com/security/cve/CVE-2018-5391/ |
ubuntu
|
high | CVE-2018-5391 high priority: Ubuntu including 77 source packages (linux, linux-aws, …), 620 status rows across 10 suites (bionic, cosmic, disco, focal, jammy, noble, oracular, trusty, upstream, xenial): DNE 392, not-affected 120, released 98, ignored 10. | https://ubuntu.com/security/CVE-2018-5391 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | >= 3.9, <= 4.18 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 6.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 7.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 7.0 | cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 6.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 6.5 | cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 6.6 | cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.2 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 6.7 | cpe:2.3:o:redhat:enterprise_linux_server_eus:6.7:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 7.5 | cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 6.6 | cpe:2.3:o:redhat:enterprise_linux_server_tus:6.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.2 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 6.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 7.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| 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:*:*:* |
| microsoft | windows_10 | — | cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1607 | cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1703 | cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1709 | cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:* |
| microsoft | windows_10 | 1803 | cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* |
| microsoft | windows_7 | — | cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:* |
| microsoft | windows_8.1 | — | cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* |
| microsoft | windows_rt_8.1 | — | cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2008 | — | cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* |
| microsoft | windows_server_2008 | r2 | cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* |
| microsoft | windows_server_2008 | r2 | cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:itanium:*:* |
| microsoft | windows_server_2012 | — | cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2012 | r2 | cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | — | cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | 1709 | cpe:2.3:o:microsoft:windows_server_2016:1709:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | 1803 | cpe:2.3:o:microsoft:windows_server_2016:1803:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 13.0.0, < 13.1.3 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 14.1.0, < 14.1.2.4 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 13.0.0, < 13.1.3 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 14.1.0, < 14.1.2.4 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 13.0.0, < 13.1.3 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 14.1.0, < 14.1.2.4 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 13.0.0, < 13.1.3 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 14.1.0, < 14.1.2.4 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 13.0.0, < 13.1.3 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 14.1.0, < 14.1.2.4 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 13.0.0, < 13.1.3 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 14.1.0, < 14.1.2.4 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 13.0.0, < 13.1.3 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 14.1.0, < 14.1.2.4 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 11.5.1, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 12.1.0, < 12.1.5 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |