CVE-2025-38105 (GCVE-0-2025-38105)
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: 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
Impacted products
Vendor Product Version
Linux Linux Version: c88469704d63787e8d44ca5ea1c1bd0adc29572d
Version: c88469704d63787e8d44ca5ea1c1bd0adc29572d
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          "programFiles": [
            "sound/usb/midi.c"
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          "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."
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      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:12:19.852Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1"
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      "title": "ALSA: usb-audio: Kill timer properly at removal",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38105",
    "datePublished": "2025-07-03T08:35:15.301Z",
    "dateReserved": "2025-04-16T04:51:23.985Z",
    "dateUpdated": "2025-07-28T04:12:19.852Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38105\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:23.997\",\"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\\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().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/62066758d2ae169278e5d6aea5995b1b6f6ddeb5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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