{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-38605",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-38605"
  ],
  "published": "2024-06-19T13:48:33Z",
  "summary": "ALSA: core: Fix NULL module pointer assignment at card init",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: core: Fix NULL module pointer assignment at card init\n\nThe commit 81033c6b584b (\"ALSA: core: Warn on empty module\")\nintroduced a WARN_ON() for a NULL module pointer passed at snd_card\nobject creation, and it also wraps the code around it with '#ifdef\nMODULE'.  This works in most cases, but the devils are always in\ndetails.  \"MODULE\" is defined when the target code (i.e. the sound\ncore) is built as a module; but this doesn't mean that the caller is\nalso built-in or not.  Namely, when only the sound core is built-in\n(CONFIG_SND=y) while the driver is a module (CONFIG_SND_USB_AUDIO=m),\nthe passed module pointer is ignored even if it's non-NULL, and\ncard->module remains as NULL.  This would result in the missing module\nreference up/down at the device open/close, leading to a race with the\ncode execution after the module removal.\n\nFor addressing the bug, move the assignment of card->module again out\nof ifdef.  The WARN_ON() is still wrapped with ifdef because the\nmodule can be really NULL when all sound drivers are built-in.\n\nNote that we keep 'ifdef MODULE' for WARN_ON(), otherwise it would\nlead to a false-positive NULL module check.  Admittedly it won't catch\nperfectly, i.e. no check is performed when CONFIG_SND=y.  But, it's no\nreal problem as it's only for debugging, and the condition is pretty\nrare.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-38605"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d7ff29a429b56f04783152ad7bbd7233b740e434"
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      "url": "https://git.kernel.org/stable/c/e7e0ca200772bdb2fdc6d43d32d341e87a36f811"
    },
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      "url": "https://git.kernel.org/stable/c/e007476725730c1a68387b54b7629486d8a8301e"
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      "url": "https://git.kernel.org/stable/c/c935e72139e6d523defd60fe875c01eb1f9ea5c5"
    },
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      "url": "https://git.kernel.org/stable/c/6b8374ee2cabcf034faa34e69a855dc496a9ec12"
    },
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      "url": "https://git.kernel.org/stable/c/39381fe7394e5eafac76e7e9367e7351138a29c1"
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    "upstream_modified": "2026-08-05T11:52:36Z"
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}