{"id":"CVE-2019-9512","title":"Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service","summary":"Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how effic…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400"],"vendor":"apple","product":"swiftnio","affected":["swiftnio >= 1.0.0, <= 1.4.0","traffic_server >= 6.0.0, <= 6.2.3","traffic_server >= 7.0.0, <= 7.1.6","traffic_server >= 8.0.0, <= 8.0.3","debian_linux = 10.0","node.js >= 8.0.0, <= 8.8.1","node.js >= 8.9.0, < 8.16.1","node.js >= 10.0.0, <= 10.12.0","node.js >= 10.13.0, < 10.16.3","node.js >= 12.0.0, < 12.8.1"],"patched":["node.js 12.8.1"],"published":"2019-08-13","updated":"2026-06-17","sourceUpdated":"2026-06-17T02:43:51.673","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2019-9512","references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.html","label":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.html","label":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.html","label":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.html","label":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html","label":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html","label":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.html","label":"cret@cert.org"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/16","label":"cret@cert.org"},{"url":"http://www.openwall.com/lists/oss-security/2019/08/20/1","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2594","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2661","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2682","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2690","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2726","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2766","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2769","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2796","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2861","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2925","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2939","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2955","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2966","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3131","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3245","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3265","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3892","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3906","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4018","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4019","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4020","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4021","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4040","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4041","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4042","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4045","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4269","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4273","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4352","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0406","label":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0727","label":"cret@cert.org"},{"url":"https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md","label":"cret@cert.org"},{"url":"https://kb.cert.org/vuls/id/605641/","label":"cret@cert.org"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10296","label":"cret@cert.org"},{"url":"https://lists.apache.org/thread.html/392108390cef48af647a2e47b7fd5380e050e35ae8d1aa2030254c04%40%3Cusers.trafficserver.apache.org%3E","label":"cret@cert.org"},{"url":"https://lists.apache.org/thread.html/ad3d01e767199c1aed8033bb6b3f5bf98c011c7c536f07a5d34b3c19%40%3Cannounce.trafficserver.apache.org%3E","label":"cret@cert.org"},{"url":"https://lists.apache.org/thread.html/bde52309316ae798186d783a5e29f4ad1527f61c9219a289d0eee0a7%40%3Cdev.trafficserver.apache.org%3E","label":"cret@cert.org"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00011.html","label":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/","label":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/","label":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/","label":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/","label":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Aug/24","label":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Aug/31","label":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Aug/43","label":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Sep/18","label":"cret@cert.org"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0001/","label":"cret@cert.org"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0004/","label":"cret@cert.org"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0005/","label":"cret@cert.org"},{"url":"https://support.f5.com/csp/article/K98053339","label":"cret@cert.org"},{"url":"https://support.f5.com/csp/article/K98053339?utm_source=f5support&amp%3Butm_medium=RSS","label":"cret@cert.org"},{"url":"https://usn.ubuntu.com/4308-1/","label":"cret@cert.org"},{"url":"https://www.debian.org/security/2019/dsa-4503","label":"cret@cert.org"},{"url":"https://www.debian.org/security/2019/dsa-4508","label":"cret@cert.org"},{"url":"https://www.debian.org/security/2019/dsa-4520","label":"cret@cert.org"},{"url":"https://www.synology.com/security/advisory/Synology_SA_19_33","label":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/16","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2019/08/20/1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2594","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2661","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2682","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2690","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2726","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2766","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2769","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2796","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2861","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2925","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2939","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2955","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2966","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3131","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3245","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3265","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3892","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3906","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4018","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4019","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4020","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4021","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4040","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4041","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4042","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4045","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4269","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4273","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:4352","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2020:0406","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2020:0727","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kb.cert.org/vuls/id/605641/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10296","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/392108390cef48af647a2e47b7fd5380e050e35ae8d1aa2030254c04%40%3Cusers.trafficserver.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/ad3d01e767199c1aed8033bb6b3f5bf98c011c7c536f07a5d34b3c19%40%3Cannounce.trafficserver.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/bde52309316ae798186d783a5e29f4ad1527f61c9219a289d0eee0a7%40%3Cdev.trafficserver.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00011.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Aug/24","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Aug/31","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Aug/43","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Sep/18","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0001/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0004/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0005/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.f5.com/csp/article/K98053339","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.f5.com/csp/article/K98053339?utm_source=f5support&amp%3Butm_medium=RSS","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4308-1/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2019/dsa-4503","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2019/dsa-4508","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2019/dsa-4520","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.synology.com/security/advisory/Synology_SA_19_33","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-14T13:51:46.827Z","epss":0.83433,"epssPercentile":0.99676,"slug":"CVE-2019-9512","body":"## Overview\n\nSome HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.\n\n## Affected\n\n- `swiftnio >= 1.0.0, <= 1.4.0`\n- `traffic_server >= 6.0.0, <= 6.2.3`\n- `traffic_server >= 7.0.0, <= 7.1.6`\n- `traffic_server >= 8.0.0, <= 8.0.3`\n- `debian_linux = 10.0`\n- `node.js >= 8.0.0, <= 8.8.1`\n- `node.js >= 8.9.0, < 8.16.1`\n- `node.js >= 10.0.0, <= 10.12.0`\n- `node.js >= 10.13.0, < 10.16.3`\n- `node.js >= 12.0.0, < 12.8.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `node.js 12.8.1`","depth":"twilight","depthScore":58,"depthScoreParts":{"impact":41.3,"likelihood":16.7,"exploitation":0,"ransomware":0},"changes":[{"seq":202696,"id":"CVE-2019-9512","ts":1789402267047,"field":"epss","old":null,"new":"0.83433"},{"seq":202685,"id":"CVE-2019-9512","ts":1789402197757,"field":"epss","old":"0.83433","new":null},{"seq":202657,"id":"CVE-2019-9512","ts":1789402174267,"field":"epss","old":null,"new":"0.83433"},{"seq":201395,"id":"CVE-2019-9512","ts":1789399372810,"field":"epss","old":"0.83433","new":null},{"seq":201387,"id":"CVE-2019-9512","ts":1789399343692,"field":"epss","old":null,"new":"0.83433"},{"seq":200122,"id":"CVE-2019-9512","ts":1789395758282,"field":"epss","old":"0.83433","new":null},{"seq":199314,"id":"CVE-2019-9512","ts":1789395352740,"field":"epss","old":null,"new":"0.83433"}]}