CVE-2025-38111 (GCVE-0-2025-38111)
Vulnerability from cvelistv5
Published
2025-07-03 08:35
Modified
2025-07-28 04:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mdiobus: Fix potential out-of-bounds read/write access When using publicly available tools like 'mdio-tools' to read/write data from/to network interface and its PHY via mdiobus, there is no verification of parameters passed to the ioctl and it accepts any mdio address. Currently there is support for 32 addresses in kernel via PHY_MAX_ADDR define, but it is possible to pass higher value than that via ioctl. While read/write operation should generally fail in this case, mdiobus provides stats array, where wrong address may allow out-of-bounds read/write. Fix that by adding address verification before read/write operation. While this excludes this access from any statistics, it improves security of read/write operation.
References
Impacted products
Vendor Product Version
Linux Linux Version: 080bb352fad00d04995102f681b134e3754bfb6e
Version: 080bb352fad00d04995102f681b134e3754bfb6e
Version: 080bb352fad00d04995102f681b134e3754bfb6e
Version: 080bb352fad00d04995102f681b134e3754bfb6e
Version: 080bb352fad00d04995102f681b134e3754bfb6e
Version: 080bb352fad00d04995102f681b134e3754bfb6e
Version: 080bb352fad00d04995102f681b134e3754bfb6e
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/phy/mdio_bus.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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            {
              "lessThanOrEqual": "5.15.*",
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              "version": "5.15.186",
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            },
            {
              "lessThanOrEqual": "6.1.*",
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              "version": "6.1.142",
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            },
            {
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            },
            {
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            },
            {
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              "status": "unaffected",
              "version": "6.15.3",
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            },
            {
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              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mdiobus: Fix potential out-of-bounds read/write access\n\nWhen using publicly available tools like \u0027mdio-tools\u0027 to read/write data\nfrom/to network interface and its PHY via mdiobus, there is no verification of\nparameters passed to the ioctl and it accepts any mdio address.\nCurrently there is support for 32 addresses in kernel via PHY_MAX_ADDR define,\nbut it is possible to pass higher value than that via ioctl.\nWhile read/write operation should generally fail in this case,\nmdiobus provides stats array, where wrong address may allow out-of-bounds\nread/write.\n\nFix that by adding address verification before read/write operation.\nWhile this excludes this access from any statistics, it improves security of\nread/write operation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:12:27.829Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/19c5875e26c4ed5686d82a7d8f7051385461b9eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/014ad9210373d2104f6ef10e6bb999a7a0a4c50e"
        },
        {
          "url": "https://git.kernel.org/stable/c/73d478234a619f3476028cb02dee699c30ae8262"
        },
        {
          "url": "https://git.kernel.org/stable/c/bab6bca0834cbb5be2a7cfe59ec6ad016ec72608"
        },
        {
          "url": "https://git.kernel.org/stable/c/b02d9d2732483e670bc34cb233d28e1d43b15da4"
        },
        {
          "url": "https://git.kernel.org/stable/c/049af7ac45a6b407748ee0995278fd861e36df8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/0e629694126ca388916f059453a1c36adde219c4"
        }
      ],
      "title": "net/mdiobus: Fix potential out-of-bounds read/write access",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38111",
    "datePublished": "2025-07-03T08:35:20.643Z",
    "dateReserved": "2025-04-16T04:51:23.985Z",
    "dateUpdated": "2025-07-28T04:12:27.829Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38111\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:24.810\",\"lastModified\":\"2025-07-03T15:13:53.147\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/mdiobus: Fix potential out-of-bounds read/write access\\n\\nWhen using publicly available tools like \u0027mdio-tools\u0027 to read/write data\\nfrom/to network interface and its PHY via mdiobus, there is no verification of\\nparameters passed to the ioctl and it accepts any mdio address.\\nCurrently there is support for 32 addresses in kernel via PHY_MAX_ADDR define,\\nbut it is possible to pass higher value than that via ioctl.\\nWhile read/write operation should generally fail in this case,\\nmdiobus provides stats array, where wrong address may allow out-of-bounds\\nread/write.\\n\\nFix that by adding address verification before read/write operation.\\nWhile this excludes this access from any statistics, it improves security of\\nread/write operation.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/mdiobus: corrige el posible acceso de lectura/escritura fuera de los l\u00edmites Cuando se utilizan herramientas disponibles p\u00fablicamente como \u0027mdio-tools\u0027 para leer/escribir datos desde/hacia la interfaz de red y su PHY a trav\u00e9s de mdiobus, no hay verificaci\u00f3n de los par\u00e1metros pasados a ioctl y acepta cualquier direcci\u00f3n mdio. Actualmente hay soporte para 32 direcciones en el kernel a trav\u00e9s de la definici\u00f3n PHY_MAX_ADDR, pero es posible pasar un valor m\u00e1s alto que ese a trav\u00e9s de ioctl. Si bien la operaci\u00f3n de lectura/escritura generalmente deber\u00eda fallar en este caso, mdiobus proporciona una matriz de estad\u00edsticas, donde la direcci\u00f3n incorrecta puede permitir la lectura/escritura fuera de los l\u00edmites. Corrija eso agregando la verificaci\u00f3n de direcci\u00f3n antes de la operaci\u00f3n de lectura/escritura. Si bien esto excluye este acceso de cualquier estad\u00edstica, mejora la seguridad de la operaci\u00f3n de lectura/escritura.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/014ad9210373d2104f6ef10e6bb999a7a0a4c50e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/049af7ac45a6b407748ee0995278fd861e36df8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0e629694126ca388916f059453a1c36adde219c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/19c5875e26c4ed5686d82a7d8f7051385461b9eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73d478234a619f3476028cb02dee699c30ae8262\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b02d9d2732483e670bc34cb233d28e1d43b15da4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bab6bca0834cbb5be2a7cfe59ec6ad016ec72608\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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