FKIE_CVE-2025-38105

Vulnerability from fkie_nvd - Published: 2025-07-03 09:15 - Updated: 2025-11-20 21:39
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Kill timer properly at removal The USB-audio MIDI code initializes the timer, but in a rare case, the driver might be freed without the disconnect call. This leaves the timer in an active state while the assigned object is released via snd_usbmidi_free(), which ends up with a kernel warning when the debug configuration is enabled, as spotted by fuzzer. For avoiding the problem, put timer_shutdown_sync() at snd_usbmidi_free(), so that the timer can be killed properly. While we're at it, replace the existing timer_delete_sync() at the disconnect callback with timer_shutdown_sync(), too.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62066758d2ae169278e5d6aea5995b1b6f6ddeb5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/647410a7da46067953a53c0d03f8680eff570959Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c611b9e55174e439dcd85a72969b43a95f3827a4Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.6.111",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Kill timer properly at removal\n\nThe USB-audio MIDI code initializes the timer, but in a rare case, the\ndriver might be freed without the disconnect call.  This leaves the\ntimer in an active state while the assigned object is released via\nsnd_usbmidi_free(), which ends up with a kernel warning when the debug\nconfiguration is enabled, as spotted by fuzzer.\n\nFor avoiding the problem, put timer_shutdown_sync() at\nsnd_usbmidi_free(), so that the timer can be killed properly.\nWhile we\u0027re at it, replace the existing timer_delete_sync() at the\ndisconnect callback with timer_shutdown_sync(), too."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: usb-audio: Kill timer properly at removal El c\u00f3digo MIDI USB-audio inicializa el temporizador, pero en un caso raro, el controlador podr\u00eda liberarse sin la llamada de desconexi\u00f3n. Esto deja al temporizador en un estado activo mientras el objeto asignado se libera a trav\u00e9s de snd_usbmidi_free(), lo que termina con una advertencia del kernel cuando se habilita la configuraci\u00f3n de depuraci\u00f3n, como lo detect\u00f3 un fuzzer. Para evitar el problema, coloque timer_shutdown_sync() en snd_usbmidi_free(), para que el temporizador pueda ser eliminado correctamente. Mientras estamos en ello, reemplace tambi\u00e9n el timer_delete_sync() existente en la devoluci\u00f3n de llamada de desconexi\u00f3n con timer_shutdown_sync()."
    }
  ],
  "id": "CVE-2025-38105",
  "lastModified": "2025-11-20T21:39:12.730",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-07-03T09:15:23.997",
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  "vulnStatus": "Analyzed",
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      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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