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CVE-2026-68417

Estado: RecibidaAlta (7.8)—

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

RDMA/siw: publish QP after initialization

siw_create_qp() currently calls siw_qp_add() before the queues, CQ pointers, state, completion, and device list entry are ready. A QPN lookup can therefore reach a QP that is still being constructed.

Move siw_qp_add() to the end of siw_create_qp(), after QP initialization and before adding the QP to the siw device list.

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.

AV:L, PR:L, sin UI: escalada local. Acceso a QP no inicializados permite ejecución de código o DoS en kernel RDMA/InfiniBand (siw_qp_add() prematura).

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationFilter Network Traffic

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)

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{
  "id": "CVE-2026-68417",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "f29dd55b0236f7a26a4b9dd69186e3c04266797b",
              "lessThan": "3c9d128219964dcea897bf6139b88242e987be8f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29dd55b0236f7a26a4b9dd69186e3c04266797b",
              "lessThan": "3ff82e3841ecab1ff38d5817c969a019d266c83c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29dd55b0236f7a26a4b9dd69186e3c04266797b",
              "lessThan": "36e91a58397ca8c978e38a0bf389f0c6113fa8ca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29dd55b0236f7a26a4b9dd69186e3c04266797b",
              "lessThan": "74912ad168f87d6b2b670a87987bb302d6e64aa1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29dd55b0236f7a26a4b9dd69186e3c04266797b",
              "lessThan": "fcc9d50022bcdb1f9f7ed04955c72b4a7355af3d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29dd55b0236f7a26a4b9dd69186e3c04266797b",
              "lessThan": "52f9fcb191143448df55fd215ff09c5207fed43e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29dd55b0236f7a26a4b9dd69186e3c04266797b",
              "lessThan": "bb27fcc67c429d97f785c92c35a6c5adebb05d7f",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/infiniband/sw/siw/siw_verbs.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.3",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/infiniband/sw/siw/siw_verbs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:35.510",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/36e91a58397ca8c978e38a0bf389f0c6113fa8ca",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3c9d128219964dcea897bf6139b88242e987be8f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3ff82e3841ecab1ff38d5817c969a019d266c83c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/52f9fcb191143448df55fd215ff09c5207fed43e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/74912ad168f87d6b2b670a87987bb302d6e64aa1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bb27fcc67c429d97f785c92c35a6c5adebb05d7f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fcc9d50022bcdb1f9f7ed04955c72b4a7355af3d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: publish QP after initialization\n\nsiw_create_qp() currently calls siw_qp_add() before the queues, CQ\npointers, state, completion, and device list entry are ready. A QPN\nlookup can therefore reach a QP that is still being constructed.\n\nMove siw_qp_add() to the end of siw_create_qp(), after QP\ninitialization and before adding the QP to the siw device list."
    }
  ],
  "lastModified": "2026-08-19T17:20:49.223",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}