{"id":"UBUNTU-CVE-2018-16844","details":"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.","modified":"2026-01-30T02:44:47.960798Z","published":"2018-11-06T00:00:00Z","related":["USN-3812-1"],"upstream":["CVE-2018-16844"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-16844"},{"type":"REPORT","url":"http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3812-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-16844"}],"affected":[{"package":{"name":"nginx","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/nginx@1.10.3-0ubuntu0.16.04.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.3-0ubuntu0.16.04.3"}]}],"versions":["1.9.3-1ubuntu1","1.9.6-2ubuntu1","1.9.6-2ubuntu2","1.9.9-0ubuntu1","1.9.9-1ubuntu1","1.9.10-0ubuntu1","1.9.10-1ubuntu1","1.9.11-0ubuntu1","1.9.11-0ubuntu2","1.9.12-0ubuntu1","1.9.13-0ubuntu1","1.9.14-0ubuntu1","1.9.15-0ubuntu1","1.10.0-0ubuntu0.16.04.1","1.10.0-0ubuntu0.16.04.2","1.10.0-0ubuntu0.16.04.3","1.10.0-0ubuntu0.16.04.4","1.10.3-0ubuntu0.16.04.1","1.10.3-0ubuntu0.16.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"nginx","binary_version":"1.10.3-0ubuntu0.16.04.3"},{"binary_name":"nginx-common","binary_version":"1.10.3-0ubuntu0.16.04.3"},{"binary_name":"nginx-core","binary_version":"1.10.3-0ubuntu0.16.04.3"},{"binary_name":"nginx-extras","binary_version":"1.10.3-0ubuntu0.16.04.3"},{"binary_name":"nginx-full","binary_version":"1.10.3-0ubuntu0.16.04.3"},{"binary_name":"nginx-light","binary_version":"1.10.3-0ubuntu0.16.04.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-16844.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/nginx@1.14.0-0ubuntu1.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.0-0ubuntu1.2"}]}],"versions":["1.12.1-0ubuntu2","1.13.6-2ubuntu1","1.13.6-2ubuntu2","1.13.10-1ubuntu1","1.13.12-0ubuntu1","1.14.0-0ubuntu1","1.14.0-0ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-cache-purge","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-lua","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-ndk","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-subs-filter","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-upstream-fair","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-mail","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-nchan","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-rtmp","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"libnginx-mod-stream","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"nginx","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"nginx-common","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"nginx-core","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"nginx-extras","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"nginx-full","binary_version":"1.14.0-0ubuntu1.2"},{"binary_name":"nginx-light","binary_version":"1.14.0-0ubuntu1.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-16844.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}