Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.
総合評価: CVE-2019-11479 は高リスク（69.9/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 91.66%、100 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。 直近 1 日で EPSS が +78.30% 上昇。悪用への関心が高まっている可能性があります。 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 | 13.36% | 91.66% | +78.30% |
| 2 | 2026-04-03 | 13.58% | 13.36% | -0.22% |
| 3 | 2025-12-28 | — | 13.58% | — |
EPSS の全履歴 （全 30 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] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2019-11479 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-2019-11479 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2019-11479 |
suse
|
high | CVE-2019-11479 severity important: SUSE including 690 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 943 product×package rows across 101 product lines (SUSE CaaS Platform 3.0, SUSE Enterprise Storage 4, … (101 product lines)): Fixed 752, Known Affected 157, Known Not Affected 34. | https://www.suse.com/security/cve/CVE-2019-11479/ |
ubuntu
|
medium | CVE-2019-11479 medium priority: Ubuntu including 92 source packages (linux, linux-aws, …), 856 status rows across 12 suites (bionic, cosmic, disco, eoan, focal, jammy, noble, oracular, plucky, trusty, upstream, xenial): DNE 570, released 136, not-affected 135, ignored 15. | https://ubuntu.com/security/CVE-2019-11479 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | >= 4.4, < 4.4.182 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.9, < 4.9.182 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.14, < 4.14.127 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.19, < 4.19.52 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.1, < 5.1.11 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 13.1.0, < 13.1.3.2 | 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 | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_advanced_firewall_manager | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 13.1.0, < 13.1.3.2 | 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 | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_access_policy_manager | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 13.1.0, < 13.1.3.2 | 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 | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_acceleration_manager | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_link_controller | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* |
| f5 | big-ip_link_controller | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* |
| f5 | big-ip_link_controller | >= 13.1.0, < 13.1.3.2 | cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* |
| f5 | big-ip_link_controller | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* |
| f5 | big-ip_link_controller | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* |
| f5 | big-ip_link_controller | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* |
| f5 | big-ip_policy_enforcement_manager | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_policy_enforcement_manager | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_policy_enforcement_manager | >= 13.1.0, < 13.1.3.2 | cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_policy_enforcement_manager | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_policy_enforcement_manager | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_policy_enforcement_manager | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_webaccelerator | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* |
| f5 | big-ip_webaccelerator | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* |
| f5 | big-ip_webaccelerator | >= 13.1.0, < 13.1.3.2 | cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* |
| f5 | big-ip_webaccelerator | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* |
| f5 | big-ip_webaccelerator | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* |
| f5 | big-ip_webaccelerator | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 13.1.0, < 13.1.3.2 | 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 | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_application_security_manager | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_local_traffic_manager | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_local_traffic_manager | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_local_traffic_manager | >= 13.1.0, < 13.1.3.2 | cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_local_traffic_manager | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_local_traffic_manager | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_local_traffic_manager | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 13.1.0, < 13.1.3.2 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |
| f5 | big-ip_fraud_protection_service | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* |
| f5 | big-ip_global_traffic_manager | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_global_traffic_manager | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_global_traffic_manager | >= 13.1.0, < 13.1.3.2 | cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_global_traffic_manager | >= 14.0.0, < 14.0.1.1 | cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_global_traffic_manager | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_global_traffic_manager | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 13.1.0, < 13.1.3.2 | 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 | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_analytics | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 13.1.0, < 13.1.3.2 | 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 | >= 14.1.2, < 14.1.2.1 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_edge_gateway | >= 15.0.0, < 15.0.1.1 | cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 11.5.2, < 11.6.5.1 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 12.1.0, < 12.1.5.1 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |
| f5 | big-ip_domain_name_system | >= 13.1.0, < 13.1.3.2 | cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* |