{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "remote packet capture server"
          ],
          "product": "libpcap",
          "programFiles": [
            "rpcapd/daemon.c"
          ],
          "programRoutines": [
            {
              "name": "daemon_unpackapplyfilter()"
            }
          ],
          "repo": "https://github.com/the-tcpdump-group/libpcap/",
          "vendor": "The Tcpdump Group",
          "versions": [
            {
              "status": "affected",
              "version": "1.9.x"
            },
            {
              "lessThan": "1.10.7",
              "status": "affected",
              "version": "1.10.x",
              "versionType": "semver"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "The problem is specific to the remote packet capture code, which is not enabled in the default build configuration."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use.  A malicious client can cause the server to leak memory substantially faster."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "A functional exploit exists."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-401",
              "description": "CWE-401 Missing Release of Memory after Effective Lifetime",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-05T18:51:32.438Z",
        "orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896",
        "shortName": "Tcpdump"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to libpcap 1.10.7."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "rpcapd memory leak in libpcap before 1.10.7",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896",
    "assignerShortName": "Tcpdump",
    "cveId": "CVE-2026-18313",
    "datePublished": "2026-09-05T18:51:32.438Z",
    "dateReserved": "2026-07-29T17:47:46.571Z",
    "dateUpdated": "2026-09-05T18:51:32.438Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-18313\",\"sourceIdentifier\":\"security@tcpdump.org\",\"published\":\"2026-09-05T19:16:55.590\",\"lastModified\":\"2026-09-05T19:16:55.590\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use.  A malicious client can cause the server to leak memory substantially faster.\"}],\"affected\":[{\"source\":\"security@tcpdump.org\",\"affectedData\":[{\"vendor\":\"The Tcpdump Group\",\"product\":\"libpcap\",\"defaultStatus\":\"unaffected\",\"modules\":[\"remote packet capture server\"],\"programFiles\":[\"rpcapd/daemon.c\"],\"programRoutines\":[{\"name\":\"daemon_unpackapplyfilter()\"}],\"repo\":\"https://github.com/the-tcpdump-group/libpcap/\",\"versions\":[{\"version\":\"1.9.x\",\"status\":\"affected\"},{\"version\":\"1.10.x\",\"lessThan\":\"1.10.7\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@tcpdump.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"security@tcpdump.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"references\":[{\"url\":\"https://github.com/the-tcpdump-group/libpcap/commit/f9775af1a0ec76db60c7213241e6b48f1be10ac7\",\"source\":\"security@tcpdump.org\"}]}}"
  }
}