CVE catalog

CVE-2019-9512

h2o: CVE-2019-9512

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Aug 13, 2019, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 83.43% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	h2o	bookworm	`2.2.5+dfsg2-7`	fixed
Debian	trafficserver	bookworm	`9.2.5+ds-0+deb12u4`	fixed
Debian	trafficserver	bookworm-security	`9.2.5+ds-0+deb12u4`	fixed
Alpine	nodejs	3.10	`10.16.3-r0`	fixed
Alpine	nodejs	3.11	`10.16.3-r0`	fixed
Alpine	nodejs	3.12	`10.16.3-r0`	fixed
Alpine	nodejs	3.13	`10.16.3-r0`	fixed
Alpine	nodejs	3.14	`10.16.3-r0`	fixed
Alpine	nodejs	3.15	`10.16.3-r0`	fixed
Alpine	nodejs	3.16	`10.16.3-r0`	fixed
Alpine	nodejs	3.17	`10.16.3-r0`	fixed
Alpine	nodejs	3.18	`10.16.3-r0`	fixed
Alpine	nodejs	3.19	`10.16.3-r0`	fixed
Alpine	nodejs	3.20	`10.16.3-r0`	fixed
Alpine	nodejs	3.21	`10.16.3-r0`	fixed
Alpine	nodejs	3.22	`10.16.3-r0`	fixed
Alpine	nodejs	3.23	`10.16.3-r0`	fixed
Alpine	nodejs	3.24	`10.16.3-r0`	fixed
Alpine	nodejs	3.9	`10.16.3-r0`	fixed
Ubuntu	netty	pro	`1:4.1.7-4`	vulnerable
Ubuntu	netty	pro	`1:4.1.7-4ubuntu0.1~esm1`	vulnerable
Ubuntu	netty	pro	`1:4.1.7-4ubuntu0.1`	vulnerable
Ubuntu	netty	pro	`1:4.1.7-4ubuntu0.1+esm1`	fixed
Ubuntu	golang-1.10	14.04	`1.10.4-2ubuntu1~14.04.1`	vulnerable
Ubuntu	golang-1.10	16.04	`1.10.4-2ubuntu1~16.04.1`	vulnerable
Ubuntu	golang-1.10	16.04	`1.10.4-2ubuntu1~16.04.2`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6-0ubuntu1`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6-0ubuntu2`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6-0ubuntu3`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6-0ubuntu4`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6-0ubuntu5`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6.1-0ubuntu1`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6.2-0ubuntu5~16.04`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6.2-0ubuntu5~16.04.2`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6.2-0ubuntu5~16.04.3`	vulnerable
Ubuntu	golang-1.6	16.04	`1.6.2-0ubuntu5~16.04.4`	vulnerable
Ubuntu	trafficserver	16.04	`5.3.0-2ubuntu1`	vulnerable
Ubuntu	trafficserver	16.04	`5.3.0-2ubuntu2`	vulnerable
Ubuntu	twisted	18.04	`16.6.0-2ubuntu3`	vulnerable
Ubuntu	twisted	18.04	`17.9.0-1`	vulnerable
Ubuntu	twisted	18.04	`17.9.0-2`	vulnerable
Ubuntu	twisted	18.04	`17.9.0-2ubuntu0.1`	fixed
Ubuntu	golang-1.10	18.04	`1.10~rc1-1`	vulnerable
Ubuntu	golang-1.10	18.04	`1.10~rc1-1ubuntu1`	vulnerable
Ubuntu	golang-1.10	18.04	`1.10~rc1-2ubuntu1`	vulnerable
Ubuntu	golang-1.10	18.04	`1.10~rc2-1ubuntu1`	vulnerable
Ubuntu	golang-1.10	18.04	`1.10-1ubuntu1`	vulnerable
Ubuntu	golang-1.10	18.04	`1.10.1-1ubuntu2`	vulnerable
Ubuntu	golang-1.10	18.04	`1.10.4-2ubuntu1~18.04.1`	vulnerable
Ubuntu	golang-1.10	18.04	`1.10.4-2ubuntu1~18.04.2`	vulnerable
Ubuntu	golang-1.8	18.04	`1.8.3-2ubuntu1`	vulnerable
Ubuntu	golang-1.8	18.04	`1.8.3-2ubuntu1.18.04.1`	vulnerable
Ubuntu	golang-1.9	18.04	`1.9.1-2ubuntu1`	vulnerable
Ubuntu	golang-1.9	18.04	`1.9.2-1ubuntu1`	vulnerable
Ubuntu	golang-1.9	18.04	`1.9.2-3ubuntu1`	vulnerable
Ubuntu	golang-1.9	18.04	`1.9.3-1ubuntu1`	vulnerable
Ubuntu	golang-1.9	18.04	`1.9.4-1ubuntu1`	vulnerable
Ubuntu	h2o	pro	`2.2.3+dfsg-2`	vulnerable
Ubuntu	h2o	pro	`2.2.4+dfsg-1`	vulnerable
Ubuntu	h2o	pro	`2.2.4+dfsg-1build1`	vulnerable
Ubuntu	h2o	pro	`2.2.4+dfsg-1ubuntu0.1~esm2`	vulnerable
Ubuntu	netty	pro	`1:4.1.7-4`	vulnerable
Ubuntu	netty	pro	`1:4.1.7-4ubuntu0.1~esm1`	vulnerable
Ubuntu	netty	pro	`1:4.1.7-4ubuntu0.1`	vulnerable
Ubuntu	netty	pro	`1:4.1.7-4ubuntu0.1+esm1`	fixed
Ubuntu	trafficserver	18.04	`7.0.0-5`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-2`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-2build1`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-3`	vulnerable
Ubuntu	twisted	20.04	`18.9.0-3ubuntu1`	vulnerable
Ubuntu	twisted	20.04	`18.9.0-5`	vulnerable
Ubuntu	twisted	20.04	`18.9.0-6`	vulnerable
Ubuntu	twisted	20.04	`18.9.0-6build1`	vulnerable
Ubuntu	twisted	20.04	`18.9.0-6ubuntu1`	fixed
Opensuse	go1.12	leap 15.1	`1.12.9-lp151.2.9.1`	fixed
Opensuse	go1.12	leap 15.1	`1.12.9-lp151.2.17.1`	fixed
Opensuse	go1.12	leap 15.0	`1.12.9-lp151.2.13.1`	fixed
Opensuse	go1.12	leap 15.1	`1.12.9-lp151.2.13.1`	fixed
Opensuse	go1.12	leap 15.1	`1.12.9-lp151.2.21.1`	fixed
Opensuse	go1.11	leap 15.0	`1.11.13-lp151.2.9.1`	fixed
Opensuse	go1.11	leap 15.1	`1.11.13-lp151.2.9.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	h2o	source	bookworm	`2.2.5+dfsg2-3`	not yet assigned	Not reported	[934886]
Debian	trafficserver	source	bookworm	`8.0.5+ds-1`	not yet assigned	Not reported	[934887]
Alpine	nodejs	apk	3.10	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.11	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.12	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.13	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.14	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.15	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.16	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.17	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.18	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.19	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.20	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.21	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.22	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.23	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.24	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Alpine	nodejs	apk	3.9	`10.16.3-r0`	Not reported	ALPINE-CVE-2019-9512	Not reported
Ubuntu	netty	deb	pro	`1:4.1.7-4ubuntu0.1+esm1`	Not reported	USN-4866-1	Not reported
Ubuntu	twisted	deb	18.04	`17.9.0-2ubuntu0.1`	Not reported	UBUNTU-CVE-2019-9512	Not reported
Ubuntu	netty	deb	pro	`1:4.1.7-4ubuntu0.1+esm1`	Not reported	UBUNTU-CVE-2019-9512	Not reported
Ubuntu	twisted	deb	20.04	`18.9.0-6ubuntu1`	Not reported	UBUNTU-CVE-2019-9512	Not reported
Opensuse	go1.12	rpm	leap 15.1	`1.12.9-lp151.2.9.1`	Not reported	OPENSUSE-SU-2019:2000-1	Not reported
Opensuse	go1.12	rpm	leap 15.1	`1.12.9-lp151.2.17.1`	Not reported	OPENSUSE-SU-2019:2085-1	Not reported
Opensuse	go1.12	rpm	leap 15.0	`1.12.9-lp151.2.13.1`	Not reported	OPENSUSE-SU-2019:2056-1	Not reported
Opensuse	go1.12	rpm	leap 15.1	`1.12.9-lp151.2.13.1`	Not reported	OPENSUSE-SU-2019:2056-1	Not reported
Opensuse	go1.12	rpm	leap 15.1	`1.12.9-lp151.2.21.1`	Not reported	OPENSUSE-SU-2019:2130-1	Not reported
Opensuse	go1.11	rpm	leap 15.0	`1.11.13-lp151.2.9.1`	Not reported	OPENSUSE-SU-2019:2072-1	Not reported
Opensuse	go1.11	rpm	leap 15.1	`1.11.13-lp151.2.9.1`	Not reported	OPENSUSE-SU-2019:2072-1	Not reported

[Debian bug #934886][Debian bug #934887]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[h2o]Unknown
Details (2)
- 2.2.5+dfsg2-7 · amd64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
- 2.2.5+dfsg2-7 · arm64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
[h2o-doc]Unknown
Source package: [h2o]
Details (2)
- 2.2.5+dfsg2-7 · all · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
- 2.2.5+dfsg2-7 · all · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
[libh2o0.13]Unknown
Source package: [h2o]
Details (2)
- 2.2.5+dfsg2-7 · amd64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
- 2.2.5+dfsg2-7 · arm64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
[libh2o-dev]Unknown
Source package: [h2o]
Details (2)
- 2.2.5+dfsg2-7 · amd64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
- 2.2.5+dfsg2-7 · arm64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
[libh2o-dev-common]Unknown
Source package: [h2o]
Details (2)
- 2.2.5+dfsg2-7 · all · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
- 2.2.5+dfsg2-7 · all · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
[libh2o-evloop0.13]Unknown
Source package: [h2o]
Details (2)
- 2.2.5+dfsg2-7 · amd64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
- 2.2.5+dfsg2-7 · arm64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
[libh2o-evloop-dev]Unknown
Source package: [h2o]
Details (2)
- 2.2.5+dfsg2-7 · amd64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
- 2.2.5+dfsg2-7 · arm64 · bookworm
  Fixed · Fixed: 2.2.5+dfsg2-3
  dsa · h2o · debian · bookworm; dsa · h2o · debian · 12
[trafficserver]Unknown
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
[trafficserver-dev]Unknown
Source package: [trafficserver]
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
[trafficserver-experimental-plugins]Unknown
Source package: [trafficserver]
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 8.0.5+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12

Observed: Oct 23, 2026, 5:45:29 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]