FKIE_CVE-2025-40058

Vulnerability from fkie_nvd - Published: 2025-10-28 12:15 - Updated: 2026-10-19 21:10
Severity
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Disallow dirty tracking if incoherent page walk Dirty page tracking relies on the IOMMU atomically updating the dirty bit in the paging-structure entry. For this operation to succeed, the paging- structure memory must be coherent between the IOMMU and the CPU. In another word, if the iommu page walk is incoherent, dirty page tracking doesn't work. The Intel VT-d specification, Section 3.10 "Snoop Behavior" states: "Remapping hardware encountering the need to atomically update A/EA/D bits in a paging-structure entry that is not snooped will result in a non- recoverable fault." To prevent an IOMMU from being incorrectly configured for dirty page tracking when it is operating in an incoherent mode, mark SSADS as supported only when both ecap_slads and ecap_smpwc are supported.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57f55048e564dedd8a4546d018e29d6bbfff0a7e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8d096ce0e87bdc361f0b25d7943543bc53aa0b9e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebe16d245a00626bb87163862a1b07daf5475a3e
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/intel/iommu.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ebe16d245a00626bb87163862a1b07daf5475a3e",
              "status": "affected",
              "version": "f35f22cc760eb2c7034bf53251399685d611e03f",
              "versionType": "git"
            },
            {
              "lessThan": "8d096ce0e87bdc361f0b25d7943543bc53aa0b9e",
              "status": "affected",
              "version": "f35f22cc760eb2c7034bf53251399685d611e03f",
              "versionType": "git"
            },
            {
              "lessThan": "57f55048e564dedd8a4546d018e29d6bbfff0a7e",
              "status": "affected",
              "version": "f35f22cc760eb2c7034bf53251399685d611e03f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/intel/iommu.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Disallow dirty tracking if incoherent page walk\n\nDirty page tracking relies on the IOMMU atomically updating the dirty bit\nin the paging-structure entry. For this operation to succeed, the paging-\nstructure memory must be coherent between the IOMMU and the CPU. In\nanother word, if the iommu page walk is incoherent, dirty page tracking\ndoesn\u0027t work.\n\nThe Intel VT-d specification, Section 3.10 \"Snoop Behavior\" states:\n\n\"Remapping hardware encountering the need to atomically update A/EA/D bits\n in a paging-structure entry that is not snooped will result in a non-\n recoverable fault.\"\n\nTo prevent an IOMMU from being incorrectly configured for dirty page\ntracking when it is operating in an incoherent mode, mark SSADS as\nsupported only when both ecap_slads and ecap_smpwc are supported."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\niommu/vt-d: No permitir el seguimiento de p\u00e1ginas modificadas si el recorrido de p\u00e1gina es incoherente\n\nEl seguimiento de p\u00e1ginas modificadas depende de que la IOMMU actualice at\u00f3micamente el bit de p\u00e1gina modificada en la entrada de la estructura de paginaci\u00f3n. Para que esta operaci\u00f3n tenga \u00e9xito, la memoria de la estructura de paginaci\u00f3n debe ser coherente entre la IOMMU y la CPU. En otras palabras, si el recorrido de p\u00e1gina de la iommu es incoherente, el seguimiento de p\u00e1ginas modificadas no funciona.\n\nLa especificaci\u00f3n Intel VT-d, Secci\u00f3n 3.10 \u0027Comportamiento de Snoop\u0027 establece:\n\n\u0027El hardware de reasignaci\u00f3n que encuentre la necesidad de actualizar at\u00f3micamente los bits A/EA/D en una entrada de estructura de paginaci\u00f3n que no sea supervisada resultar\u00e1 en una falla no recuperable.\u0027\n\nPara evitar que una IOMMU sea configurada incorrectamente para el seguimiento de p\u00e1ginas modificadas cuando opera en un modo incoherente, marque SSADS como compatible solo cuando tanto ecap_slads como ecap_smpwc sean compatibles."
    }
  ],
  "id": "CVE-2025-40058",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 6.0,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-10-28T12:15:40.150",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/57f55048e564dedd8a4546d018e29d6bbfff0a7e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d096ce0e87bdc361f0b25d7943543bc53aa0b9e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebe16d245a00626bb87163862a1b07daf5475a3e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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