{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:lldpd_project:lldpd:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.0.22"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "df8d7298598f4ff4cbb20957ccb4e8e2bde96f06"
            },
            {
              "fixed": "ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6"
            }
          ],
          "repo": "https://github.com/lldpd/lldpd",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-2g8p-2h3j-63m3"
  ],
  "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"
  },
  "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.",
  "id": "CVE-2026-46433",
  "modified": "2026-07-08T05:37:53.723908928Z",
  "published": "2026-06-09T22:49:02.749Z",
  "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"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "lldpd: Heap OOB Read in VLAN Decapsulation memmove"
}