{"id":"USN-8718-1","summary":"sssd vulnerability","details":"It was discovered that SSSD did not properly validate authentication token\nlengths when processing PAM responder requests. A local attacker could\npossibly use this issue to cause SSSD to crash, resulting in a denial of\nservice.","modified":"2026-09-03T22:56:56.460245890Z","published":"2026-09-03T12:00:57Z","related":["UBUNTU-CVE-2026-68743"],"upstream":["CVE-2026-68743","UBUNTU-CVE-2026-68743"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8718-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-68743"}],"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"},{"fixed":"1.13.4-1ubuntu1.15+esm1"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"1.13.4-1ubuntu1.15+esm1","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_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_name":"libsss-simpleifp0","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"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_name":"python-libipa-hbac","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_name":"python-libsss-nss-idmap","binary_version":"1.13.4-1ubuntu1.15+esm1"},{"binary_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"python-sss"},{"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_version":"1.13.4-1ubuntu1.15+esm1","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_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_version":"1.13.4-1ubuntu1.15+esm1","binary_name":"sssd-tools"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-68743"}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8718-1.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"},{"fixed":"1.16.1-1ubuntu1.8+esm1"}]}],"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"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): 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