CVE-2025-38133 (GCVE-0-2025-38133)
Vulnerability from cvelistv5
Published
2025-07-03 08:35
Modified
2025-07-28 04:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: adc: ad4851: fix ad4858 chan pointer handling The pointer returned from ad4851_parse_channels_common() is incremented internally as each channel is populated. In ad4858_parse_channels(), the same pointer was further incremented while setting ext_scan_type fields for each channel. This resulted in indio_dev->channels being set to a pointer past the end of the allocated array, potentially causing memory corruption or undefined behavior. Fix this by iterating over the channels using an explicit index instead of incrementing the pointer. This preserves the original base pointer and ensures all channel metadata is set correctly.
References
Impacted products
Vendor Product Version
Linux Linux Version: 6250803fe2ec92be32a4df1c3a39c4a460d5bd58
Version: 6250803fe2ec92be32a4df1c3a39c4a460d5bd58
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{
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/iio/adc/ad4851.c"
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ad4851: fix ad4858 chan pointer handling\n\nThe pointer returned from ad4851_parse_channels_common() is incremented\ninternally as each channel is populated. In ad4858_parse_channels(),\nthe same pointer was further incremented while setting ext_scan_type\nfields for each channel. This resulted in indio_dev-\u003echannels being set\nto a pointer past the end of the allocated array, potentially causing\nmemory corruption or undefined behavior.\n\nFix this by iterating over the channels using an explicit index instead\nof incrementing the pointer. This preserves the original base pointer\nand ensures all channel metadata is set correctly."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:13:08.930Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/6c3b9e1167d072ce2d01cafec7866647cf8d3616"
        },
        {
          "url": "https://git.kernel.org/stable/c/499a8cee812588905cc940837e69918c1649a19e"
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      ],
      "title": "iio: adc: ad4851: fix ad4858 chan pointer handling",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38133",
    "datePublished": "2025-07-03T08:35:36.802Z",
    "dateReserved": "2025-04-16T04:51:23.987Z",
    "dateUpdated": "2025-07-28T04:13:08.930Z",
    "state": "PUBLISHED"
  },
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38133\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:27.697\",\"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\\niio: adc: ad4851: fix ad4858 chan pointer handling\\n\\nThe pointer returned from ad4851_parse_channels_common() is incremented\\ninternally as each channel is populated. In ad4858_parse_channels(),\\nthe same pointer was further incremented while setting ext_scan_type\\nfields for each channel. This resulted in indio_dev-\u003echannels being set\\nto a pointer past the end of the allocated array, potentially causing\\nmemory corruption or undefined behavior.\\n\\nFix this by iterating over the channels using an explicit index instead\\nof incrementing the pointer. This preserves the original base pointer\\nand ensures all channel metadata is set correctly.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: adc: ad4851: correcci\u00f3n del manejo del puntero de canal ad4858. El puntero devuelto por ad4851_parse_channels_common() se incrementa internamente a medida que se rellena cada canal. En ad4858_parse_channels(), el mismo puntero se increment\u00f3 a\u00fan m\u00e1s al configurar los campos ext_scan_type para cada canal. Esto provoc\u00f3 que indio_dev-\u0026gt;channels se configurara en un puntero m\u00e1s all\u00e1 del final de la matriz asignada, lo que podr\u00eda causar corrupci\u00f3n de memoria o un comportamiento indefinido. Corrija esto iterando sobre los canales utilizando un \u00edndice expl\u00edcito en lugar de incrementar el puntero. Esto preserva el puntero base original y garantiza que todos los metadatos del canal se configuren correctamente.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/499a8cee812588905cc940837e69918c1649a19e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6c3b9e1167d072ce2d01cafec7866647cf8d3616\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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