{"id":"UBUNTU-CVE-2026-5367","details":"A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker's virtual machine port.","modified":"2026-05-26T19:29:30.465768726Z","published":"2026-04-20T00:00:00Z","upstream":["CVE-2026-5367"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-5367"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-5367"}],"affected":[{"package":{"name":"ovn","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ovn?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.90~git20200107.c80e014d4-0ubuntu1","2.12.90~git20200107.c80e014d4-0ubuntu2","20.03.0~git20200212.9a4e68ec8-0ubuntu1","20.03.0~git20200212.9a4e68ec8-0ubuntu3","20.03.0-0ubuntu1","20.03.1-0ubuntu1","20.03.1-0ubuntu1.1","20.03.1-0ubuntu1.2","20.03.2-0ubuntu0.20.04.1","20.03.2-0ubuntu0.20.04.2","20.03.2-0ubuntu0.20.04.3","20.03.2-0ubuntu0.20.04.4","20.03.2-0ubuntu0.20.04.5","20.03.2-0ubuntu0.20.04.6"],"ecosystem_specific":{"binaries":[{"binary_name":"ovn-central","binary_version":"20.03.2-0ubuntu0.20.04.6"},{"binary_name":"ovn-common","binary_version":"20.03.2-0ubuntu0.20.04.6"},{"binary_name":"ovn-controller-vtep","binary_version":"20.03.2-0ubuntu0.20.04.6"},{"binary_name":"ovn-docker","binary_version":"20.03.2-0ubuntu0.20.04.6"},{"binary_name":"ovn-host","binary_version":"20.03.2-0ubuntu0.20.04.6"},{"binary_name":"ovn-ic","binary_version":"20.03.2-0ubuntu0.20.04.6"},{"binary_name":"ovn-ic-db","binary_version":"20.03.2-0ubuntu0.20.04.6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5367.json"}},{"package":{"name":"ovn","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ovn?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["21.09.0~git20210922.6549e5842-0ubuntu1","21.09.0~git20210922.6549e5842-0ubuntu2","21.09.0-0ubuntu2","21.12.0-0ubuntu1","22.03.0~git20220218.ed81be7-0ubuntu1","22.03.0-0ubuntu1","22.03.2-0ubuntu0.22.04.1","22.03.3-0ubuntu0.22.04.1","22.03.3-0ubuntu0.22.04.2","22.03.3-0ubuntu0.22.04.3","22.03.3-0ubuntu0.22.04.5","22.03.8-0ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"ovn-central","binary_version":"22.03.8-0ubuntu0.22.04.1"},{"binary_name":"ovn-common","binary_version":"22.03.8-0ubuntu0.22.04.1"},{"binary_version":"22.03.8-0ubuntu0.22.04.1","binary_name":"ovn-controller-vtep"},{"binary_name":"ovn-docker","binary_version":"22.03.8-0ubuntu0.22.04.1"},{"binary_name":"ovn-host","binary_version":"22.03.8-0ubuntu0.22.04.1"},{"binary_name":"ovn-ic","binary_version":"22.03.8-0ubuntu0.22.04.1"},{"binary_name":"ovn-ic-db","binary_version":"22.03.8-0ubuntu0.22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5367.json"}},{"package":{"name":"ovn","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ovn?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["23.09.0-1","23.09.0-2","24.03.0~git20240205.ebb7076-1","24.03.1-2ubuntu1","24.03.1-2ubuntu3","24.03.2-0ubuntu0.24.04.1","24.03.2-0ubuntu0.24.04.2","24.03.6-0ubuntu0.24.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"ovn-central","binary_version":"24.03.6-0ubuntu0.24.04.1"},{"binary_version":"24.03.6-0ubuntu0.24.04.1","binary_name":"ovn-common"},{"binary_name":"ovn-controller-vtep","binary_version":"24.03.6-0ubuntu0.24.04.1"},{"binary_version":"24.03.6-0ubuntu0.24.04.1","binary_name":"ovn-docker"},{"binary_version":"24.03.6-0ubuntu0.24.04.1","binary_name":"ovn-host"},{"binary_name":"ovn-ic","binary_version":"24.03.6-0ubuntu0.24.04.1"},{"binary_version":"24.03.6-0ubuntu0.24.04.1","binary_name":"ovn-ic-db"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5367.json"}},{"package":{"name":"ovn","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/ovn?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["25.03.0-1","25.09.0~git20250813.23884f5-maysync1","25.09.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ovn-central","binary_version":"25.09.0-1"},{"binary_name":"ovn-common","binary_version":"25.09.0-1"},{"binary_name":"ovn-controller-vtep","binary_version":"25.09.0-1"},{"binary_name":"ovn-docker","binary_version":"25.09.0-1"},{"binary_name":"ovn-host","binary_version":"25.09.0-1"},{"binary_name":"ovn-ic","binary_version":"25.09.0-1"},{"binary_name":"ovn-ic-db","binary_version":"25.09.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5367.json"}},{"package":{"name":"ovn","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/ovn?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["25.09.0-1","25.09.0-3","26.03.0~git20260216.b543a88-2","26.03.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"26.03.0-2","binary_name":"ovn-central"},{"bina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