{"id":"UBUNTU-CVE-2026-90996","details":"A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to the Network Security Services (NSS) responder. This could lead to a denial-of-service condition, causing the NSS responder to become unstable or terminate. This vulnerability affects the availability of the system responder.","modified":"2026-09-16T14:03:36.462326451Z","published":"2026-09-14T16:17:00Z","upstream":["CVE-2026-90996"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-90996"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-90996"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2478986"}],"affected":[{"package":{"name":"sssd","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.5-2","1.13.1-2","1.13.2-1","1.13.3-1","1.13.4-1","1.13.4-1ubuntu1","1.13.4-1ubuntu1.1","1.13.4-1ubuntu1.2","1.13.4-1ubuntu1.5","1.13.4-1ubuntu1.6","1.13.4-1ubuntu1.7","1.13.4-1ubuntu1.8","1.13.4-1ubuntu1.9","1.13.4-1ubuntu1.10","1.13.4-1ubuntu1.11","1.13.4-1ubuntu1.12","1.13.4-1ubuntu1.13","1.13.4-1ubuntu1.14","1.13.4-1ubuntu1.15","1.13.4-1ubuntu1.15+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libipa-hbac0","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"libnss-sss","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"libpam-sss"},{"binary_name":"libsss-idmap0","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"libsss-nss-idmap0","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"libsss-simpleifp0"},{"binary_name":"libsss-sudo","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"libwbclient-sssd","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"python-libipa-hbac"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"python-libsss-nss-idmap"},{"binary_name":"python-sss","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"python3-libipa-hbac","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"python3-libsss-nss-idmap"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"python3-sss"},{"binary_name":"sssd","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-ad","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-ad-common","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"sssd-common"},{"binary_name":"sssd-dbus","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-ipa","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-krb5","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-krb5-common","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-ldap","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-proxy","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"sssd-tools","binary_version":"1.13.4-1ubuntu1.15+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90996.json"}},{"package":{"name":"sssd","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.3-2ubuntu1","1.15.3-3ubuntu1","1.16.0-5ubuntu1","1.16.0-5ubuntu2","1.16.1-1ubuntu1","1.16.1-1ubuntu1.1","1.16.1-1ubuntu1.2","1.16.1-1ubuntu1.3","1.16.1-1ubuntu1.4","1.16.1-1ubuntu1.5","1.16.1-1ubuntu1.6","1.16.1-1ubuntu1.7","1.16.1-1ubuntu1.8","1.16.1-1ubuntu1.8+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libipa-hbac0","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"libnss-sss"},{"binary_name":"libpam-sss","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"libsss-certmap0","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"libsss-idmap0"},{"binary_name":"libsss-nss-idmap0","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"libsss-simpleifp0","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"libsss-sudo"},{"binary_name":"libwbclient-sssd","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"python-libipa-hbac","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"python-libsss-nss-idmap"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"python-sss"},{"binary_name":"python3-libipa-hbac","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"python3-libsss-nss-idmap"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"python3-sss"},{"binary_name":"sssd","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"sssd-ad","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"sssd-ad-common"},{"binary_name":"sssd-common","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"sssd-dbus","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"sssd-ipa"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"sssd-kcm"},{"binary_name":"sssd-krb5","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_name":"sssd-krb5-common","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"sssd-ldap"},{"binary_name":"sssd-proxy","binary_version":"1.16.1-1ubuntu1.8+esm1"},{"binary_version":"1.16.1-1ubuntu1.8+esm1","binary_name":"sssd-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90996.json"}},{"package":{"name":"sssd","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.0-4ubuntu1","2.2.2-1","2.2.2-1ubuntu1","2.2.3-1.1ubuntu1","2.2.3-2","2.2.3-3","2.2.3-3ubuntu0.1","2.2.3-3ubuntu0.2","2.2.3-3ubuntu0.3","2.2.3-3ubuntu0.4","2.2.3-3ubuntu0.6","2.2.3-3ubuntu0.7","2.2.3-3ubuntu0.8","2.2.3-3ubuntu0.9","2.2.3-3ubuntu0.10","2.2.3-3ubuntu0.11","2.2.3-3ubuntu0.12","2.2.3-3ubuntu0.13","2.2.3-3ubuntu0.13+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"libipa-hbac0"},{"binary_name":"libnss-sss","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"libpam-sss","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"libsss-certmap0","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"libsss-idmap0","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"libsss-nss-idmap0","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"libsss-simpleifp0","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"libsss-sudo","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"libwbclient-sssd","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"python3-libipa-hbac","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"python3-libsss-nss-idmap"},{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"python3-sss"},{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"sssd"},{"binary_name":"sssd-ad","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"sssd-ad-common","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"sssd-common"},{"binary_name":"sssd-dbus","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"sssd-ipa","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"sssd-kcm","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"sssd-krb5"},{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"sssd-krb5-common"},{"binary_name":"sssd-ldap","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_name":"sssd-proxy","binary_version":"2.2.3-3ubuntu0.13+esm1"},{"binary_version":"2.2.3-3ubuntu0.13+esm1","binary_name":"sssd-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90996.json"}},{"package":{"name":"sssd","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.1-2ubuntu4","2.5.2-4ubuntu1","2.5.2-4ubuntu3","2.5.2-4ubuntu4","2.6.1-1ubuntu3","2.6.3-1ubuntu3","2.6.3-1ubuntu3.1","2.6.3-1ubuntu3.2","2.6.3-1ubuntu3.3","2.6.3-1ubuntu3.4","2.6.3-1ubuntu3.5","2.6.3-1ubuntu3.6","2.6.3-1ubuntu3.8","2.6.3-1ubuntu3.9"],"ecosystem_specific":{"binaries":[{"binary_name":"libipa-hbac0","binary_version":"2.6.3-1ubuntu3.9"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"libnss-sss"},{"binary_name":"libpam-sss","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"libsss-certmap0","binary_version":"2.6.3-1ubuntu3.9"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"libsss-idmap0"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"libsss-nss-idmap0"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"libsss-simpleifp0"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"libsss-sudo"},{"binary_name":"python3-libipa-hbac","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"python3-libsss-nss-idmap","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"python3-sss","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"sssd","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"sssd-ad","binary_version":"2.6.3-1ubuntu3.9"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"sssd-ad-common"},{"binary_name":"sssd-common","binary_version":"2.6.3-1ubuntu3.9"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"sssd-dbus"},{"binary_name":"sssd-ipa","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"sssd-kcm","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"sssd-krb5","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"sssd-krb5-common","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"sssd-ldap","binary_version":"2.6.3-1ubuntu3.9"},{"binary_name":"sssd-proxy","binary_version":"2.6.3-1ubuntu3.9"},{"binary_version":"2.6.3-1ubuntu3.9","binary_name":"sssd-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90996.json"}},{"package":{"name":"sssd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.9.1-2ubuntu2","2.9.1-2ubuntu3","2.9.2-1ubuntu2","2.9.4-1ubuntu1","2.9.4-1.1ubuntu3","2.9.4-1.1ubuntu5","2.9.4-1.1ubuntu6","2.9.4-1.1ubuntu6.1","2.9.4-1.1ubuntu6.2","2.9.4-1.1ubuntu6.3","2.9.4-1.1ubuntu6.4","2.9.4-1.1ubuntu6.5","2.9.4-1.1ubuntu6.6","2.9.4-1.1ubuntu6.7","2.9.4-1.1ubuntu6.8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.9.4-1.1ubuntu6.8","binary_name":"libipa-hbac0t64"},{"binary_name":"libnss-sss","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"libpam-sss","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"libsss-certmap0","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_version":"2.9.4-1.1ubuntu6.8","binary_name":"libsss-idmap0"},{"binary_name":"libsss-nss-idmap0","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_version":"2.9.4-1.1ubuntu6.8","binary_name":"libsss-sudo"},{"binary_name":"python3-libipa-hbac","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_version":"2.9.4-1.1ubuntu6.8","binary_name":"python3-libsss-nss-idmap"},{"binary_name":"python3-sss","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-ad","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-ad-common","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-common","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-dbus","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-idp","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-ipa","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-kcm","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-krb5","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-krb5-common","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-ldap","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_version":"2.9.4-1.1ubuntu6.8","binary_name":"sssd-passkey"},{"binary_name":"sssd-proxy","binary_version":"2.9.4-1.1ubuntu6.8"},{"binary_name":"sssd-tools","binary_version":"2.9.4-1.1ubuntu6.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90996.json"}},{"package":{"name":"sssd","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.1-2ubuntu5","2.10.1-2ubuntu7","2.12.0-1ubuntu3","2.12.0-1ubuntu4","2.12.0-1ubuntu5","2.12.0-1ubuntu5.1","2.12.0-1ubuntu5.2","2.12.0-1ubuntu5.3","2.12.0-1ubuntu5.4"],"ecosystem_specific":{"binaries":[{"binary_name":"libipa-hbac0t64","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"libnss-sss","binary_version":"2.12.0-1ubuntu5.4"},{"binary_version":"2.12.0-1ubuntu5.4","binary_name":"libpam-sss"},{"binary_name":"libsss-certmap0","binary_version":"2.12.0-1ubuntu5.4"},{"binary_version":"2.12.0-1ubuntu5.4","binary_name":"libsss-idmap0"},{"binary_name":"libsss-nss-idmap0","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"libsss-sudo","binary_version":"2.12.0-1ubuntu5.4"},{"binary_version":"2.12.0-1ubuntu5.4","binary_name":"python3-libipa-hbac"},{"binary_name":"python3-libsss-nss-idmap","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"python3-sss","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd","binary_version":"2.12.0-1ubuntu5.4"},{"binary_version":"2.12.0-1ubuntu5.4","binary_name":"sssd-ad"},{"binary_name":"sssd-ad-common","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd-common","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd-dbus","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd-idp","binary_version":"2.12.0-1ubuntu5.4"},{"binary_version":"2.12.0-1ubuntu5.4","binary_name":"sssd-ipa"},{"binary_name":"sssd-kcm","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd-krb5","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd-krb5-common","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd-ldap","binary_version":"2.12.0-1ubuntu5.4"},{"binary_name":"sssd-passkey","binary_version":"2.12.0-1ubuntu5.4"},{"binary_version":"2.12.0-1ubuntu5.4","binary_name":"sssd-proxy"},{"binary_name":"sssd-tools","binary_version":"2.12.0-1ubuntu5.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90996.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}