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CVE-2026-74385

Estado: RecibidaAlta (7.5)—

In the Linux kernel, the following vulnerability has been resolved:

nvmet-tcp: check return value of nvmet_tcp_set_queue_sock

The return value of nvmet_tcp_set_queue_sock() is currently ignored in nvmet_tcp_tls_handshake_done(). If it fails (e.g., due to the socket not being in TCP_ESTABLISHED state), the socket callbacks will not be properly set, leading to queue and socket leakage.

Fix this by capturing the return value and calling nvmet_tcp_schedule_release_queue() on failure to ensure proper cleanup.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad en kernel Linux (AV:N, PR:N, UI:N) explotable remotamente sin privilegios. El fallo de validación en nvmet_tcp_set_queue_sock() causa DoS por agotamiento de recursos (socket/queue leakage), permitiendo denegación de servicio.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

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

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-74385",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "675b453e024154dd547921c6e6d5b58747ba7e0e",
              "lessThan": "cba2ee57fd302727aea7d41e9d9cd0969f5df0fb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "675b453e024154dd547921c6e6d5b58747ba7e0e",
              "lessThan": "22aa70f9a0544643ec37d442b6fcb1833d804462",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "675b453e024154dd547921c6e6d5b58747ba7e0e",
              "lessThan": "7ef789703e2b91775dcb36b2efa46325be31a2a0",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/nvme/target/tcp.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/nvme/target/tcp.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:40.420",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/22aa70f9a0544643ec37d442b6fcb1833d804462",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7ef789703e2b91775dcb36b2efa46325be31a2a0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cba2ee57fd302727aea7d41e9d9cd0969f5df0fb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: check return value of nvmet_tcp_set_queue_sock\n\nThe return value of nvmet_tcp_set_queue_sock() is currently ignored in\nnvmet_tcp_tls_handshake_done(). If it fails (e.g., due to the socket\nnot being in TCP_ESTABLISHED state), the socket callbacks will not be\nproperly set, leading to queue and socket leakage.\n\nFix this by capturing the return value and calling\nnvmet_tcp_schedule_release_queue() on failure to ensure proper cleanup."
    }
  ],
  "lastModified": "2026-08-17T06:19:33.460",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}