{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46433", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-13T22:18:22.830Z", "datePublished": "2026-06-09T22:49:02.749Z", "dateUpdated": "2026-06-09T22:49:02.749Z"}, "containers": {"cna": {"title": "lldpd: Heap OOB Read in VLAN Decapsulation memmove", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3"}, {"name": "https://github.com/lldpd/lldpd/pull/787", "tags": ["x_refsource_MISC"], "url": "https://github.com/lldpd/lldpd/pull/787"}, {"name": "https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6", "tags": ["x_refsource_MISC"], "url": "https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6"}, {"name": "https://github.com/lldpd/lldpd/releases/tag/1.0.22", "tags": ["x_refsource_MISC"], "url": "https://github.com/lldpd/lldpd/releases/tag/1.0.22"}], "affected": [{"vendor": "lldpd", "product": "lldpd", "versions": [{"version": "< 1.0.22", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-09T22:49:02.749Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-2g8p-2h3j-63m3", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-46433", "lastModified": "2026-06-09T23:16:59.437", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-06-09T23:16:59.437", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6"}, {"source": "security-advisories@github.com", "url": "https://github.com/lldpd/lldpd/pull/787"}, {"source": "security-advisories@github.com", "url": "https://github.com/lldpd/lldpd/releases/tag/1.0.22"}, {"source": "security-advisories@github.com", "url": "https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.0.22)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "lldpd", "source": "cna", "vendor": "lldpd"}, "product": "lldpd", "vendor": "lldpd"}], "created": "2026-06-10T00:30:17.083375+00:00", "updated": "2026-06-10T11:21:55.878185+00:00", "vendors": ["lldpd", "lldpd$PRODUCT$lldpd"]}