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CVE-2026-18238

Estado: Pendiente de análisisMedia (5)—

The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Tcpdump — LibpcapAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-18238",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-18238",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-08T15:17:08.655802Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@tcpdump.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "security@tcpdump.org",
      "affectedData": [
        {
          "repo": "https://github.com/the-tcpdump-group/libpcap/",
          "vendor": "The Tcpdump Group",
          "modules": [
            "remote packet capture client"
          ],
          "product": "libpcap",
          "versions": [
            {
              "status": "affected",
              "version": "1.8.x"
            },
            {
              "status": "affected",
              "version": "1.9.x"
            },
            {
              "status": "affected",
              "version": "1.10.x",
              "lessThan": "1.10.7",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "pcap-rpcap.c"
          ],
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "pcap_read_nocb_remote()"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-09-05T19:16:55.477",
  "references": [
    {
      "url": "https://github.com/the-tcpdump-group/libpcap/commit/b9590d482986d64673712460aae1d48d11fa0473",
      "source": "security@tcpdump.org"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@tcpdump.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-126"
        },
        {
          "lang": "en",
          "value": "CWE-1288"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers.  A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet."
    }
  ],
  "lastModified": "2026-09-08T19:20:25.117",
  "sourceIdentifier": "security@tcpdump.org"
}