CVE-2026-46004 (GCVE-0-2026-46004)
Vulnerability from cvelistv5
Published
2026-05-27 12:56
Modified
2026-06-14 17:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Handle probe errors properly The probe procedure of setup_card() in caiaq driver doesn't treat the error cases gracefully, e.g. the error from snd_card_register() calls snd_card_free() but continues. This would lead to a UAF for the further calls like snd_usb_caiaq_control_init(), as Berk suggested in another patch in the link below. However, the problem is not only that; in general, this function drops the all error handlings (as it's a void function) although its caller can propagate an error to snd_probe(), which eventually calls snd_card_free() as a proper error path. That said, we should treat each error case in setup_card(), and just return the error code promptly, which is then handled later as a fatal error in snd_probe(). This patch achieves it by changing the setup_card() to return an error code. Also, the superfluous snd_card_free() call is removed, too. Note that card->private_free can be set still safely at returning an error. All called functions in card_free() have checks of the unassigned resources or NULL checks.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
Version: 8e3cd08ed8e590952aa9a656758cb24d4ba898f8
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: caiaq: Handle probe errors properly\n\nThe probe procedure of setup_card() in caiaq driver doesn\u0027t treat the\nerror cases gracefully, e.g. the error from snd_card_register() calls\nsnd_card_free() but continues.  This would lead to a UAF for the\nfurther calls like snd_usb_caiaq_control_init(), as Berk suggested in\nanother patch in the link below.\n\nHowever, the problem is not only that; in general, this function drops\nthe all error handlings (as it\u0027s a void function) although its caller\ncan propagate an error to snd_probe(), which eventually calls\nsnd_card_free() as a proper error path.  That said, we should treat\neach error case in setup_card(), and just return the error code\npromptly, which is then handled later as a fatal error in snd_probe().\n\nThis patch achieves it by changing the setup_card() to return an error\ncode.  Also, the superfluous snd_card_free() call is removed, too.\n\nNote that card-\u003eprivate_free can be set still safely at returning an\nerror.  All called functions in card_free() have checks of the\nunassigned resources or NULL checks."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:47:26.278Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/096dd8519cf2f768e9e14f224b627f7aaee1a9c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/28abd224db4a49560b452115bca3672a20e45b2f"
        }
      ],
      "title": "ALSA: caiaq: Handle probe errors properly",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46004",
    "datePublished": "2026-05-27T12:56:01.851Z",
    "dateReserved": "2026-05-13T15:03:33.091Z",
    "dateUpdated": "2026-06-14T17:47:26.278Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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