Description
nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | nginx | 1.15.6, 1.14.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nginx | 1.14.1-1 | — |
| Debian 13 | nginx | 1.14.1-1 | — |
| Debian 12 | nginx | 1.14.1-1 | — |
| Debian 9 | nginx | 1.10.3-1+deb9u2 | DSA-4335-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | nginx | 1.14.0-0ubuntu1.2 | USN-3812-1 |
| Ubuntu 16.04 LTS | nginx | 1.10.3-0ubuntu0.16.04.3 | USN-3812-1 |
| Ubuntu 14.04 LTS | nginx | 1.4.6-1ubuntu3.9 | USN-3812-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | rh-nginx112-nginx +5 | 1:1.12.1-2.el7.1 | RHSA-2018:3680 |
| RHEL 3 | rh-nginx114-nginx +5 | 1:1.14.1-1.el7 | RHSA-2018:3681 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | nginx | 1.14.2-6.3.1 | SUSE-SU-2019:2309-1 |
| SLES 15 | nginx | 1.14.2-3.3.1 | SUSE-SU-2019:0334-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | nginx | 1.14.2-16.1 | openSUSE-SU-2019:0195-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | nginx | 1.14.2-lp151.4.3.1 | openSUSE-SU-2019:2120-1 |
| openSUSE Leap 15.0 | nginx | 1.14.2-16.1 | openSUSE-SU-2019:0195-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nginx | 1.14.1-r0 | — |
| Alpine v3.23 | nginx | 1.14.1-r0 | — |
| Alpine v3.22 | nginx | 1.14.1-r0 | — |
| Alpine v3.21 | nginx | 1.14.1-r0 | — |
| Alpine v3.20 | nginx | 1.14.1-r0 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | nginx | 1.14.1-r0 | — |
| Alpine v3.18 | nginx | 1.14.1-r0 | — |
| Alpine v3.17 | nginx | 1.14.1-r0 | — |
| Alpine v3.16 | nginx | 1.14.1-r0 | — |
| Alpine v3.15 | nginx | 1.14.1-r0 | — |
| Alpine v3.14 | nginx | 1.14.1-r0 | — |
| Alpine v3.13 | nginx | 1.14.1-r0 | — |
| Alpine v3.12 | nginx | 1.14.1-r0 | — |
| Alpine v3.11 | nginx | 1.14.1-r0 | — |
| Alpine v3.10 | nginx | 1.14.1-r0 | — |
| Alpine v3.9 | nginx | 1.14.1-r0 | — |
| Alpine v3.8 | nginx | 1.14.1-r0 | — |
| Alpine v3.7 | nginx | 1.12.1-r4 | — |
| Alpine v3.6 | nginx | 1.12.2-r2 | — |
Advisories 8
- RHSA-2018:3680 Red Hat Security Advisory: rh-nginx112-nginx security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:3681 Red Hat Security Advisory: rh-nginx114-nginx security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-4335-1 nginx - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3812-1 nginx vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:2309-1 Security update for nginx SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0334-1 Security update for nginx SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2120-1 Security update for nginx SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:0195-1 Security update for nginx SUSE / openSUSE Security Updates · May 7, 2025
References
- DSA-4335 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844
- RHSA-2018:3680 vendor-advisory
- RHSA-2018:3681 vendor-advisory
- 105868 vdb-entry
- http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html
- 1042038 vdb-entry
- USN-3812-1 vendor-advisory
- openSUSE-SU-2019:2120 vendor-advisory
- https://support.apple.com/kb/HT212818
- 20210921 APPLE-SA-2021-09-20-4 Xcode 13 mailing-list