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CVE-2026-89506

Estado: RecibidaSin puntuar—

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

RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR

The original commit missed that three drivers (mthca, irdma, siw) have UHW data associated with reg_mr that cannot be passed through the ioctl. They also assume that the udata cannot be NULL, so failing to pass a valid udata can trigger a NULL udata crash in those drivers.

This never happens in real systems since in rdma-core ibv_cmd_reg_mr_ex() does not accept a udata and those three drivers don't use it, however a malicious userspace could trigger it.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-89506",
  "cveTags": [],
  "metrics": {},
  "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": "5b2e45049dc06a876bc6b138218ddeb0814502ef",
              "lessThan": "71d5c41ac583df09a7c32199bef7d42de7267d07",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5b2e45049dc06a876bc6b138218ddeb0814502ef",
              "lessThan": "9e71d0f4944ba5641e01db29b3256c963656d671",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5b2e45049dc06a876bc6b138218ddeb0814502ef",
              "lessThan": "011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/infiniband/core/uverbs_std_types_mr.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/infiniband/core/uverbs_std_types_mr.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-11T20:19:32.917",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/71d5c41ac583df09a7c32199bef7d42de7267d07",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9e71d0f4944ba5641e01db29b3256c963656d671",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR\n\nThe original commit missed that three drivers (mthca, irdma, siw) have UHW\ndata associated with reg_mr that cannot be passed through the ioctl. They\nalso assume that the udata cannot be NULL, so failing to pass a valid\nudata can trigger a NULL udata crash in those drivers.\n\nThis never happens in real systems since in rdma-core ibv_cmd_reg_mr_ex()\ndoes not accept a udata and those three drivers don't use it, however a\nmalicious userspace could trigger it."
    }
  ],
  "lastModified": "2026-09-11T20:19:32.917",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}