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CVE-2026-68418

Estado: RecibidaSin puntuar—

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

RDMA/irdma: Prevent user-triggered null deref on QP create

Previously, the user QP creation path would only attempt to populate iwqp->iwpbl if the user-provided req.user_wqe_bufs field was non-zero. The problem is that iwqp->iwpbl is unconditionally dereferenced later on in irdma_setup_virt_qp.

While there was a check for iwqp->iwpbl != NULL, this check would only occur if req.user_wqe_bufs was non-zero. The end result is that a user could send a zero user_wqe_bufs value and trigger a null ptr deref.

Fix this by unconditionally calling irdma_get_pbl and bailing if it fails, similar to the CQ and SRQ paths.

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-2026-68418",
  "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": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
              "lessThan": "ec675b4cdfd378d8c9dd8c93126c024f2469bd79",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
              "lessThan": "728211c815f6eef28dd3df2a5b6297483185aa20",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b48c24c2d710cf34810c555dcef883a3d35a9c08",
              "lessThan": "b9b0889071569d43623c260074e159cd8f26adb1",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/infiniband/hw/irdma/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": "5.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.14",
              "versionType": "semver"
            },
            {
              "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/hw/irdma/verbs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:35.623",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/728211c815f6eef28dd3df2a5b6297483185aa20",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b9b0889071569d43623c260074e159cd8f26adb1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ec675b4cdfd378d8c9dd8c93126c024f2469bd79",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Prevent user-triggered null deref on QP create\n\nPreviously, the user QP creation path would only attempt to\npopulate iwqp->iwpbl if the user-provided req.user_wqe_bufs\nfield was non-zero. The problem is that iwqp->iwpbl is\nunconditionally dereferenced later on in irdma_setup_virt_qp.\n\nWhile there was a check for iwqp->iwpbl != NULL, this check\nwould only occur if req.user_wqe_bufs was non-zero. The end\nresult is that a user could send a zero user_wqe_bufs value\nand trigger a null ptr deref.\n\nFix this by unconditionally calling irdma_get_pbl and bailing\nif it fails, similar to the CQ and SRQ paths."
    }
  ],
  "lastModified": "2026-08-17T06:17:50.810",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}