{"id":"CVE-2019-9512","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-9512","generatedAt":"2026-10-27T23:36:55.291Z","title":"Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service.","description":"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 efficiently this data is queued, this can consume excess CPU, memory, or both.","published":"2019-08-13T21:15:12.000Z","lastModified":"2026-06-17T02:43:52.000Z","status":"Modified","sourceIdentifier":"cret@cert.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-400"],"affected":["apple/swiftnio","apache/traffic server","debian/debian linux","nodejs/node.js"],"epss":{"score":0.83433,"percentile":0.9968,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 83.4%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/16","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://www.openwall.com/lists/oss-security/2019/08/20/1","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2594","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2661","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2682","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2690","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2726","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2766","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2769","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2796","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2861","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2925","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2939","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2955","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2966","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3131","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3245","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3265","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3892","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3906","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4018","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4019","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4020","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4021","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4040","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4041","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4042","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4045","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4269","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4273","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:4352","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0406","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0727","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://kb.cert.org/vuls/id/605641/","tags":["Third Party Advisory","US Government Resource"],"source":"cret@cert.org"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10296","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://lists.apache.org/thread.html/392108390cef48af647a2e47b7fd5380e050e35ae8d1aa2030254c04%40%3Cusers.trafficserver.apache.org%3E","source":"cret@cert.org"},{"url":"https://lists.apache.org/thread.html/ad3d01e767199c1aed8033bb6b3f5bf98c011c7c536f07a5d34b3c19%40%3Cannounce.trafficserver.apache.org%3E","source":"cret@cert.org"},{"url":"https://lists.apache.org/thread.html/bde52309316ae798186d783a5e29f4ad1527f61c9219a289d0eee0a7%40%3Cdev.trafficserver.apache.org%3E","source":"cret@cert.org"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00011.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/","source":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/","source":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/","source":"cret@cert.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/","source":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Aug/24","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Aug/31","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Aug/43","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://seclists.org/bugtraq/2019/Sep/18","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0001/","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0004/","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://security.netapp.com/advisory/ntap-20190823-0005/","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://support.f5.com/csp/article/K98053339","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://support.f5.com/csp/article/K98053339?utm_source=f5support&amp%3Butm_medium=RSS","source":"cret@cert.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-9512","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}