{"id":"UBUNTU-CVE-2026-14612","details":"Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may be able to trigger ipa-otpd to write or read one byte past the end of a fixed-size buffer. Exploitation requires FreeIPA to be configured with an external IdP, attacker control or MITM of that IdP, and a user to initiate the OAuth2 device authorization flow. The most likely impact is limited denial of service affecting the ipa-otpd daemon.","modified":"2026-07-09T15:15:46Z","published":"2026-07-03T16:16:00Z","upstream":["CVE-2026-14612"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-14612"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-14612"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-14612"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2496879"}],"affected":[{"package":{"name":"freeipa","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/freeipa?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.1-0ubuntu1","3.3.4-0ubuntu1","3.3.4-0ubuntu2","3.3.4-0ubuntu3","3.3.4-0ubuntu3.1","3.3.4-0ubuntu3.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"freeipa-client","binary_version":"3.3.4-0ubuntu3.1+esm1"},{"binary_name":"python-freeipa","binary_version":"3.3.4-0ubuntu3.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14612.json"}},{"package":{"name":"freeipa","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/freeipa?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.4-1","4.3.1-0ubuntu1","4.3.1-0ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.1-0ubuntu1+esm1","binary_name":"freeipa-admintools"},{"binary_name":"freeipa-client","binary_version":"4.3.1-0ubuntu1+esm1"},{"binary_name":"freeipa-common","binary_version":"4.3.1-0ubuntu1+esm1"},{"binary_version":"4.3.1-0ubuntu1+esm1","binary_name":"freeipa-server"},{"binary_name":"freeipa-server-dns","binary_version":"4.3.1-0ubuntu1+esm1"},{"binary_version":"4.3.1-0ubuntu1+esm1","binary_name":"freeipa-server-trust-ad"},{"binary_name":"freeipa-tests","binary_version":"4.3.1-0ubuntu1+esm1"},{"binary_name":"python-ipaclient","binary_version":"4.3.1-0ubuntu1+esm1"},{"binary_name":"python-ipalib","binary_version":"4.3.1-0ubuntu1+esm1"},{"binary_name":"python-ipaserver","binary_version":"4.3.1-0ubuntu1+esm1"},{"binary_name":"python-ipatests","binary_version":"4.3.1-0ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14612.json"}},{"package":{"name":"freeipa","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/freeipa?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.4-3ubuntu1","4.4.4-4","4.7.0~pre1+git20180411-2ubuntu1","4.7.0~pre1+git20180411-2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"freeipa-admintools","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_version":"4.7.0~pre1+git20180411-2ubuntu2","binary_name":"freeipa-client"},{"binary_name":"freeipa-common","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_name":"freeipa-server","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_name":"freeipa-server-dns","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_name":"freeipa-server-trust-ad","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_name":"freeipa-tests","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_version":"4.7.0~pre1+git20180411-2ubuntu2","binary_name":"python-ipaclient"},{"binary_name":"python-ipalib","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_name":"python-ipaserver","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"},{"binary_name":"python-ipatests","binary_version":"4.7.0~pre1+git20180411-2ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14612.json"}},{"package":{"name":"freeipa","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/freeipa?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.1-2ubuntu1","4.8.3-1","4.8.6-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.8.6-1ubuntu2","binary_name":"freeipa-client"},{"binary_name":"freeipa-client-samba","binary_version":"4.8.6-1ubuntu2"},{"binary_name":"freeipa-common","binary_version":"4.8.6-1ubuntu2"},{"binary_version":"4.8.6-1ubuntu2","binary_name":"python3-ipaclient"},{"binary_name":"python3-ipalib","binary_version":"4.8.6-1ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14612.json"}},{"package":{"name":"freeipa","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/freeipa?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.6-1ubuntu6","4.8.6-1ubuntu8","4.8.6-1ubuntu9","4.9.8-1"],"ecosystem_specific":{"binaries":[{"binary_name":"freeipa-client","binary_version":"4.9.8-1"},{"binary_version":"4.9.8-1","binary_name":"freeipa-client-epn"},{"binary_version":"4.9.8-1","binary_name":"freeipa-client-samba"},{"binary_version":"4.9.8-1","binar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