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CVE-2025-38249

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3() In snd_usb_get_audioformat_uac3(), the length value returned from snd_usb_ctl_msg() is used directly for memory allocation without validation. This length is controlled by the USB device. The allocated buffer is cast to a uac3_cluster_header_descriptor and its fields are accessed without verifying that the buffer is large enough. If the device returns a smaller than expected length, this leads to an out-of-bounds read. Add a length check to ensure the buffer is large enough for uac3_cluster_header_descriptor.

Severity
HIGH
CVSS score
7.1 (v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-07-09 11:15:27.077000
Last modified
2026-11-05 21:18:23.093000
View original CVE JSON 
{
  "id": "CVE-2025-38249",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-07-09T11:15:27.077",
  "lastModified": "2026-11-05T21:18:23.093",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()\n\nIn snd_usb_get_audioformat_uac3(), the length value returned from\nsnd_usb_ctl_msg() is used directly for memory allocation without\nvalidation. This length is controlled by the USB device.\n\nThe allocated buffer is cast to a uac3_cluster_header_descriptor\nand its fields are accessed without verifying that the buffer\nis large enough. If the device returns a smaller than expected\nlength, this leads to an out-of-bounds read.\n\nAdd a length check to ensure the buffer is large enough for\nuac3_cluster_header_descriptor."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: usb-audio: Corregir lectura fuera de los límites en snd_usb_get_audioformat_uac3() En snd_usb_get_audioformat_uac3(), el valor de longitud devuelto por snd_usb_ctl_msg() se usa directamente para la asignación de memoria sin validación. Esta longitud la controla el dispositivo USB. El búfer asignado se convierte a un uac3_cluster_header_descriptor y se accede a sus campos sin verificar que el búfer sea lo suficientemente grande. Si el dispositivo devuelve una longitud menor de la esperada, esto conduce a una lectura fuera de los límites. Añada una comprobación de longitud para garantizar que el búfer sea lo suficientemente grande para uac3_cluster_header_descriptor."
    }
  ],
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          "scope": "UNCHANGED",
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          "role": "CISA Coordinator",
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  "weaknesses": [
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      "source": "[email protected]",
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      "description": [
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