{"id":"UBUNTU-CVE-2026-46433","details":"lldpd is an implementation of IEEE 802.1ab (LLDP). Prior to version 1.0.22, lldpd_decode() in src/daemon/lldpd.c strips 802.1Q VLAN tags from received Ethernet frames by calling memmove() to shift the frame payload 4 bytes left. The third argument (byte count) is s - 2 * ETHER_ADDR_LEN but should be s - 2 * ETHER_ADDR_LEN - 4, causing a 4-byte heap buffer over-read past the malloc(h_mtu) allocation when the received frame size equals the interface MTU. This issue has been patched in version 1.0.22.","modified":"2026-08-13T07:45:11.854012881Z","published":"2026-06-09T23:16:00Z","upstream":["CVE-2026-46433"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46433"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-46433"},{"type":"REPORT","url":"https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3"},{"type":"REPORT","url":"https://github.com/lldpd/lldpd/pull/787"}],"affected":[{"package":{"name":"openvswitch","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/openvswitch?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-0ubuntu4","2.4.0-0ubuntu5","2.5.0~git20160129.46a88d9-0ubuntu1","2.5.0~git20160219.522aca6-0ubuntu1","2.5.0~git20160219.522aca6-0ubuntu2","2.5.0~git20160219.522aca6-0ubuntu3","2.5.0-0ubuntu1","2.5.2-0ubuntu0.16.04.1","2.5.2-0ubuntu0.16.04.2","2.5.2-0ubuntu0.16.04.3","2.5.4-0ubuntu0.16.04.1","2.5.5-0ubuntu0.16.04.1","2.5.5-0ubuntu0.16.04.2","2.5.9-0ubuntu0.16.04.2","2.5.9-0ubuntu0.16.04.3","2.5.9-0ubuntu0.16.04.3+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"openvswitch-common","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_version":"2.5.9-0ubuntu0.16.04.3+esm1","binary_name":"openvswitch-ipsec"},{"binary_version":"2.5.9-0ubuntu0.16.04.3+esm1","binary_name":"openvswitch-pki"},{"binary_version":"2.5.9-0ubuntu0.16.04.3+esm1","binary_name":"openvswitch-switch"},{"binary_name":"openvswitch-switch-dpdk","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"openvswitch-test","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"openvswitch-testcontroller","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"openvswitch-vtep","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"ovn-central","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"ovn-common","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"ovn-docker","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"ovn-host","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"},{"binary_name":"python-openvswitch","binary_version":"2.5.9-0ubuntu0.16.04.3+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46433.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.16-1","0.7.19-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.19-1","binary_name":"lldpd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46433.json"}},{"package":{"name":"openvswitch","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/openvswitch?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.0-0ubuntu2","2.8.1-0ubuntu2","2.8.1-0ubuntu3","2.9.0~git20180205.5a39582ca-0ubuntu1","2.9.0-0ubuntu1","2.9.2-0ubuntu0.18.04.2","2.9.2-0ubuntu0.18.04.3","2.9.5-0ubuntu0.18.04.1","2.9.7-0ubuntu0.18.04.2","2.9.8-0ubuntu0.18.04.2","2.9.8-0ubuntu0.18.04.3","2.9.8-0ubuntu0.18.04.4","2.9.8-0ubuntu0.18.04.5","2.9.8-0ubuntu0.18.04.5+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"openvswitch-common","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_name":"openvswitch-pki","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_name":"openvswitch-switch","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_version":"2.9.8-0ubuntu0.18.04.5+esm1","binary_name":"openvswitch-switch-dpdk"},{"binary_version":"2.9.8-0ubuntu0.18.04.5+esm1","binary_name":"openvswitch-test"},{"binary_version":"2.9.8-0ubuntu0.18.04.5+esm1","binary_name":"openvswitch-testcontroller"},{"binary_name":"openvswitch-vtep","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_name":"ovn-central","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_name":"ovn-common","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_name":"ovn-controller-vtep","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_name":"ovn-docker","binary_version":"2.9.8-0ubuntu0.18.04.5+esm1"},{"binary_version":"2.9.8-0ubuntu0.18.04.5+esm1","binary_name":"ovn-host"},{"binary_version":"2.9.8-0ubuntu0.18.04.5+esm1","binary_name":"python-openvswitch"},{"binary_version":"2.9.8-0ubuntu0.18.04.5+esm1","binary_name":"python3-openvswitch"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46433.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.8-1","0.9.9-1","0.9.9-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"0.9.9-1ubuntu0.1"}]},"database_specific":{"so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