CVE-2025-38482 (GCVE-0-2025-38482)
Vulnerability from cvelistv5
Published
2025-07-28 11:21
Modified
2025-07-28 11:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: comedi: das6402: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: /* IRQs 2,3,5,6,7, 10,11,15 are valid for "enhanced" mode */ if ((1 << it->options[1]) & 0x8cec) { However, `it->options[i]` is an unchecked `int` value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring `it->options[1]` to be within bounds before proceeding with the original test. Valid `it->options[1]` values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.
References
Impacted products
Vendor Product Version
Linux Linux Version: 79e5e6addbb18bf56075f0ff552094a28636dd03
Version: 79e5e6addbb18bf56075f0ff552094a28636dd03
Version: 79e5e6addbb18bf56075f0ff552094a28636dd03
Version: 79e5e6addbb18bf56075f0ff552094a28636dd03
Version: 79e5e6addbb18bf56075f0ff552094a28636dd03
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{
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          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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      "cpeApplicability": [
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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\ncomedi: das6402: Fix bit shift out of bounds\n\nWhen checking for a supported IRQ number, the following test is used:\n\n\t/* IRQs 2,3,5,6,7, 10,11,15 are valid for \"enhanced\" mode */\n\tif ((1 \u003c\u003c it-\u003eoptions[1]) \u0026 0x8cec) {\n\nHowever, `it-\u003eoptions[i]` is an unchecked `int` value from userspace, so\nthe shift amount could be negative or out of bounds.  Fix the test by\nrequiring `it-\u003eoptions[1]` to be within bounds before proceeding with\nthe original test.  Valid `it-\u003eoptions[1]` values that select the IRQ\nwill be in the range [1,15]. The value 0 explicitly disables the use of\ninterrupts."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T11:21:47.026Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a18a42e77545afcacd6a2b8d9fc16191b87454df"
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        {
          "url": "https://git.kernel.org/stable/c/8a3637027ceeba4ca5e500b23cb7d24c25592513"
        },
        {
          "url": "https://git.kernel.org/stable/c/3eab654f5d199ecd45403c6588cda63e491fcfca"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a3c18cde02e35aba87e0ad5672b3e1c72dda5a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/70f2b28b5243df557f51c054c20058ae207baaac"
        }
      ],
      "title": "comedi: das6402: Fix bit shift out of bounds",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38482",
    "datePublished": "2025-07-28T11:21:47.026Z",
    "dateReserved": "2025-04-16T04:51:24.021Z",
    "dateUpdated": "2025-07-28T11:21:47.026Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38482\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-28T12:15:30.117\",\"lastModified\":\"2025-07-29T14:14:29.590\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncomedi: das6402: Fix bit shift out of bounds\\n\\nWhen checking for a supported IRQ number, the following test is used:\\n\\n\\t/* IRQs 2,3,5,6,7, 10,11,15 are valid for \\\"enhanced\\\" mode */\\n\\tif ((1 \u003c\u003c it-\u003eoptions[1]) \u0026 0x8cec) {\\n\\nHowever, `it-\u003eoptions[i]` is an unchecked `int` value from userspace, so\\nthe shift amount could be negative or out of bounds.  Fix the test by\\nrequiring `it-\u003eoptions[1]` to be within bounds before proceeding with\\nthe original test.  Valid `it-\u003eoptions[1]` values that select the IRQ\\nwill be in the range [1,15]. The value 0 explicitly disables the use of\\ninterrupts.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: comedi: das6402: Corregir desplazamiento de bits fuera de los l\u00edmites Al comprobar un n\u00famero de IRQ compatible, se utiliza la siguiente prueba: /* Las IRQ 2, 3, 5, 6, 7, 10, 11, 15 son v\u00e1lidas para el modo \\\"enhanced\\\" */ if ((1 \u0026lt;\u0026lt; it-\u0026gt;options[1]) \u0026amp; 0x8cec) { Sin embargo, `it-\u0026gt;options[i]` es un valor `int` sin comprobar del espacio de usuario, por lo que la cantidad de desplazamiento podr\u00eda ser negativa o estar fuera de los l\u00edmites. Corrija la prueba exigiendo que `it-\u0026gt;options[1]` est\u00e9 dentro de los l\u00edmites antes de continuar con la prueba original. Los valores v\u00e1lidos de `it-\u0026gt;options[1]` que seleccionan la IRQ estar\u00e1n en el rango [1, 15]. El valor 0 deshabilita expl\u00edcitamente el uso de interrupciones.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3eab654f5d199ecd45403c6588cda63e491fcfca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a3c18cde02e35aba87e0ad5672b3e1c72dda5a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/70f2b28b5243df557f51c054c20058ae207baaac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8a3637027ceeba4ca5e500b23cb7d24c25592513\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a18a42e77545afcacd6a2b8d9fc16191b87454df\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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