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CVE-2026-72158

Estado: RecibidaSin puntuar—

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

fpga: dfl: add bounds check in dfh_get_param_size()

dfh_get_param_size() can return a parameter size larger than the feature region because the loop bounds check is evaluated before incrementing size. If the EOP (End of Parameters) bit is set in the same iteration, the inflated size is returned without re-validation against max.

This can cause create_feature_instance() to call memcpy_fromio() with a size exceeding the ioremap'd region when a malicious FPGA device provides crafted DFHv1 parameter headers.

Add a bounds check after the size increment to ensure the accumulated size never exceeds the feature boundary.

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-2026-72158",
  "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": "4747ab89b4a652f835494fcf8342aaa0efb9b0fd",
              "lessThan": "b2f6220e929b2a43605331d0139e65dc1640c05c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4747ab89b4a652f835494fcf8342aaa0efb9b0fd",
              "lessThan": "3b622aa447cf26104f96a8be39539367863bc6b6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4747ab89b4a652f835494fcf8342aaa0efb9b0fd",
              "lessThan": "012683accbb7d2bcf1264f2a0ecd6aa1dcea4d68",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4747ab89b4a652f835494fcf8342aaa0efb9b0fd",
              "lessThan": "f3df5386e3bb54626c117bd85e0158d45fb4aea9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4747ab89b4a652f835494fcf8342aaa0efb9b0fd",
              "lessThan": "9e8bc49f91f3f81d957c4f1c1f09fe94e2f88f6a",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/fpga/dfl.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.3",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "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/fpga/dfl.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:33.617",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/012683accbb7d2bcf1264f2a0ecd6aa1dcea4d68",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3b622aa447cf26104f96a8be39539367863bc6b6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9e8bc49f91f3f81d957c4f1c1f09fe94e2f88f6a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b2f6220e929b2a43605331d0139e65dc1640c05c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f3df5386e3bb54626c117bd85e0158d45fb4aea9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: dfl: add bounds check in dfh_get_param_size()\n\ndfh_get_param_size() can return a parameter size larger than the feature\nregion because the loop bounds check is evaluated before incrementing\nsize. If the EOP (End of Parameters) bit is set in the same iteration,\nthe inflated size is returned without re-validation against max.\n\nThis can cause create_feature_instance() to call memcpy_fromio() with a\nsize exceeding the ioremap'd region when a malicious FPGA device provides\ncrafted DFHv1 parameter headers.\n\nAdd a bounds check after the size increment to ensure the accumulated\nsize never exceeds the feature boundary."
    }
  ],
  "lastModified": "2026-08-17T06:18:16.040",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}