--- title: "CVE-2019-9512: Some HTTP/2 implementations… | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2019-9512 --- # CVE-2019-9512: Some HTTP/2 implementations… | CubePath ## 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. Official description from the CVE record, published by certcc. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-9512) ## Key data ### CVSS 3.0 High 7.5 Score published by certcc in the CVE record. CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | None | No effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.83433 (83.4% probability) Percentile 99.7% Scores of Nov 10, 2026 Model v2026.06.15 ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [VU#605641](https://kb.cert.org/vuls/id/605641/) (kb.cert.org) third-party-advisory - [github.com/Netflix/security-bulletins/blob/master/advisorie…](https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md) - [\[trafficserver-dev\] 20190813 Apache Traffic Server is vulnerable to various HTTP/2 attacks](https://lists.apache.org/thread.html/bde52309316ae798186d783a5e29f4ad1527f61c9219a289d0eee0a7%40%3Cdev.trafficserver.apache.org%3E) (lists.apache.org) mailing-list - [\[trafficserver-users\] 20190813 Apache Traffic Server is vulnerable to various HTTP/2 attacks](https://lists.apache.org/thread.html/392108390cef48af647a2e47b7fd5380e050e35ae8d1aa2030254c04%40%3Cusers.trafficserver.apache.org%3E) (lists.apache.org) mailing-list - [\[trafficserver-announce\] 20190813 Apache Traffic Server is vulnerable to various HTTP/2 attacks](https://lists.apache.org/thread.html/ad3d01e767199c1aed8033bb6b3f5bf98c011c7c536f07a5d34b3c19%40%3Cannounce.trafficserver.apache.org%3E) (lists.apache.org) mailing-list - [20190814 APPLE-SA-2019-08-13-5 SwiftNIO HTTP/2 1.5.0](https://seclists.org/bugtraq/2019/Aug/24) (seclists.org) mailing-list - [20190816 APPLE-SA-2019-08-13-5 SwiftNIO HTTP/2 1.5.0](http://seclists.org/fulldisclosure/2019/Aug/16) (seclists.org) mailing-list - [synology.com/security/advisory/Synology\_SA\_19\_33](https://www.synology.com/security/advisory/Synology%5FSA%5F19%5F33) - [20190819 \[SECURITY\] \[DSA 4503-1\] golang-1.11 security update](https://seclists.org/bugtraq/2019/Aug/31) (seclists.org) mailing-list - [DSA-4503](https://www.debian.org/security/2019/dsa-4503) (debian.org) vendor-advisory - [support.f5.com/csp/article/K98053339](https://support.f5.com/csp/article/K98053339) - [\[oss-security\] 20190819 \[ANNOUNCE\] Security release of Kubernetes v1.15.3, v1.14.6, v1.13.10 - CVE-2019-9512 and CVE-2019-9514](http://www.openwall.com/lists/oss-security/2019/08/20/1) (openwall.com) mailing-list - [security.netapp.com/advisory/ntap-20190823-0001](https://security.netapp.com/advisory/ntap-20190823-0001/) - [security.netapp.com/advisory/ntap-20190823-0004](https://security.netapp.com/advisory/ntap-20190823-0004/) - [security.netapp.com/advisory/ntap-20190823-0005](https://security.netapp.com/advisory/ntap-20190823-0005/) - [openSUSE-SU-2019:2000](http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.html) (lists.opensuse.org) vendor-advisory - [FEDORA-2019-5a6a7bc12c](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/) (lists.fedoraproject.org) vendor-advisory - [FEDORA-2019-6a2980de56](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/) (lists.fedoraproject.org) vendor-advisory - [20190825 \[SECURITY\] \[DSA 4508-1\] h2o security update](https://seclists.org/bugtraq/2019/Aug/43) (seclists.org) mailing-list - [DSA-4508](https://www.debian.org/security/2019/dsa-4508) (debian.org) vendor-advisory - [openSUSE-SU-2019:2056](http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.html) (lists.opensuse.org) vendor-advisory - [openSUSE-SU-2019:2072](http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.html) (lists.opensuse.org) vendor-advisory - [FEDORA-2019-55d101a740](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/) (lists.fedoraproject.org) vendor-advisory - [FEDORA-2019-65db7ad6c7](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/) (lists.fedoraproject.org) vendor-advisory - [openSUSE-SU-2019:2085](http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.html) (lists.opensuse.org) vendor-advisory - [RHSA-2019:2682](https://access.redhat.com/errata/RHSA-2019:2682) (access.redhat.com) vendor-advisory - [DSA-4520](https://www.debian.org/security/2019/dsa-4520) (debian.org) vendor-advisory - [RHSA-2019:2726](https://access.redhat.com/errata/RHSA-2019:2726) (access.redhat.com) vendor-advisory - [20190910 \[SECURITY\] \[DSA 4520-1\] trafficserver security update](https://seclists.org/bugtraq/2019/Sep/18) (seclists.org) mailing-list - [RHSA-2019:2594](https://access.redhat.com/errata/RHSA-2019:2594) (access.redhat.com) vendor-advisory - [openSUSE-SU-2019:2114](http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html) (lists.opensuse.org) vendor-advisory - [openSUSE-SU-2019:2115](http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html) (lists.opensuse.org) vendor-advisory - [RHSA-2019:2661](https://access.redhat.com/errata/RHSA-2019:2661) (access.redhat.com) vendor-advisory - [kc.mcafee.com/corporate/index?page=content&id=SB10296](https://kc.mcafee.com/corporate/index?page=content&id=SB10296) - [RHSA-2019:2690](https://access.redhat.com/errata/RHSA-2019:2690) (access.redhat.com) vendor-advisory - [RHSA-2019:2766](https://access.redhat.com/errata/RHSA-2019:2766) (access.redhat.com) vendor-advisory - [openSUSE-SU-2019:2130](http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.html) (lists.opensuse.org) vendor-advisory - [RHSA-2019:2796](https://access.redhat.com/errata/RHSA-2019:2796) (access.redhat.com) vendor-advisory - [RHSA-2019:2861](https://access.redhat.com/errata/RHSA-2019:2861) (access.redhat.com) vendor-advisory - [RHSA-2019:2925](https://access.redhat.com/errata/RHSA-2019:2925) (access.redhat.com) vendor-advisory - [RHSA-2019:2939](https://access.redhat.com/errata/RHSA-2019:2939) (access.redhat.com) vendor-advisory - [RHSA-2019:2955](https://access.redhat.com/errata/RHSA-2019:2955) (access.redhat.com) vendor-advisory - [RHSA-2019:2966](https://access.redhat.com/errata/RHSA-2019:2966) (access.redhat.com) vendor-advisory - [support.f5.com/csp/article/K98053339?utm\_source=f5support&a…](https://support.f5.com/csp/article/K98053339?utm%5Fsource=f5support&%3Butm%5Fmedium=RSS) - [RHSA-2019:3131](https://access.redhat.com/errata/RHSA-2019:3131) (access.redhat.com) vendor-advisory - [RHSA-2019:2769](https://access.redhat.com/errata/RHSA-2019:2769) (access.redhat.com) vendor-advisory - [RHSA-2019:3245](https://access.redhat.com/errata/RHSA-2019:3245) (access.redhat.com) vendor-advisory - [RHSA-2019:3265](https://access.redhat.com/errata/RHSA-2019:3265) (access.redhat.com) vendor-advisory - [RHSA-2019:3892](https://access.redhat.com/errata/RHSA-2019:3892) (access.redhat.com) vendor-advisory - [RHSA-2019:3906](https://access.redhat.com/errata/RHSA-2019:3906) (access.redhat.com) vendor-advisory - [RHSA-2019:4018](https://access.redhat.com/errata/RHSA-2019:4018) (access.redhat.com) vendor-advisory - [RHSA-2019:4019](https://access.redhat.com/errata/RHSA-2019:4019) (access.redhat.com) vendor-advisory - [RHSA-2019:4021](https://access.redhat.com/errata/RHSA-2019:4021) (access.redhat.com) vendor-advisory - [RHSA-2019:4020](https://access.redhat.com/errata/RHSA-2019:4020) (access.redhat.com) vendor-advisory - [RHSA-2019:4045](https://access.redhat.com/errata/RHSA-2019:4045) (access.redhat.com) vendor-advisory - [RHSA-2019:4042](https://access.redhat.com/errata/RHSA-2019:4042) (access.redhat.com) vendor-advisory - [RHSA-2019:4040](https://access.redhat.com/errata/RHSA-2019:4040) (access.redhat.com) vendor-advisory - [RHSA-2019:4041](https://access.redhat.com/errata/RHSA-2019:4041) (access.redhat.com) vendor-advisory - [RHSA-2019:4269](https://access.redhat.com/errata/RHSA-2019:4269) (access.redhat.com) vendor-advisory - [RHSA-2019:4273](https://access.redhat.com/errata/RHSA-2019:4273) (access.redhat.com) vendor-advisory - [RHSA-2019:4352](https://access.redhat.com/errata/RHSA-2019:4352) (access.redhat.com) vendor-advisory - [RHSA-2020:0406](https://access.redhat.com/errata/RHSA-2020:0406) (access.redhat.com) vendor-advisory - [RHSA-2020:0727](https://access.redhat.com/errata/RHSA-2020:0727) (access.redhat.com) vendor-advisory - [USN-4308-1](https://usn.ubuntu.com/4308-1/) (usn.ubuntu.com) vendor-advisory - [\[debian-lts-announce\] 20201208 \[SECURITY\] \[DLA 2485-1\] golang-golang-x-net-dev security update](https://lists.debian.org/debian-lts-announce/2020/12/msg00011.html) (lists.debian.org) mailing-list ## Timeline 1. ID reserved Mar 1, 2019 2. Record published Aug 13, 2019 3. Record last updated Aug 4, 2024 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:01 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)