{"id":"CVE-2026-46433","summary":"lldpd: Heap OOB Read in VLAN Decapsulation memmove","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.","aliases":["GHSA-2g8p-2h3j-63m3"],"modified":"2026-07-08T08:13:04.054221Z","published":"2026-06-09T22:49:02.749Z","related":["openSUSE-SU-2026:10794-1","openSUSE-SU-2026:21146-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46433.json"},"references":[{"type":"WEB","url":"https://github.com/lldpd/lldpd/releases/tag/1.0.22"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46433.json"},{"type":"ADVISORY","url":"https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46433"},{"type":"FIX","url":"https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6"},{"type":"FIX","url":"https://github.com/lldpd/lldpd/pull/787"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lldpd/lldpd","events":[{"introduced":"0"},{"fixed":"df8d7298598f4ff4cbb20957ccb4e8e2bde96f06"},{"fixed":"ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.0.22"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:lldpd_project:lldpd:*:*:*:*:*:*:*:*"}}],"versions":["1.0.21","1.0.20","1.0.19","1.0.18","1.0.17","1.0.16","1.0.15","1.0.14","1.0.13","1.0.12","1.0.11","1.0.10","1.0.9","1.0.8","1.0.7","1.0.6","1.0.5","1.0.4","1.0.3","1.0.2","1.0.1","1.0.0","0.9.9","0.9.8","0.9.7","0.9.6","0.9.5","0.9.4","0.9.3","0.9.2","0.9.1","0.9.0","0.8.0","0.7.16","0.7.15","0.7.14","0.7.13","0.7.12","0.7.11","0.7.10","0.7.9","0.7.8","0.7.7","0.7.6","0.7.5","0.7.4","0.7.3","0.7.2","0.7.1","0.7.0","0.6.1","0.6.0","0.5.5","0.5.4","0.5.2","0.5.1","0.5.0","0.4.0","0.3.2","0.3.1","0.3","0.2.1","0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46433.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}