CVE-2026-46004

Description

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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-06-01 | Assigner Linux

Product status

References

git.kernel.org/...c/da938aa9fc7826901921dcea225948ab21a97e45

git.kernel.org/...c/09616e25f502080ba684fc7fcf959d1376ab756d

git.kernel.org/...c/b956e48371f2ff72b76be9a829800ecec963bd45

git.kernel.org/...c/f537e3ad69609f6924a4db6b4a7f6561f5288bdd

git.kernel.org/...c/6251e3e256337a30160ef59ab1580dde4d1acd28

git.kernel.org/...c/e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056

git.kernel.org/...c/096dd8519cf2f768e9e14f224b627f7aaee1a9c5

git.kernel.org/...c/28abd224db4a49560b452115bca3672a20e45b2f

cve.org (CVE-2026-46004)

nvd.nist.gov (CVE-2026-46004)

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