CVE-2026-46004

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ALSA: caiaq: Handle probe errors properly<br /> <br /> The probe procedure of setup_card() in caiaq driver doesn&amp;#39;t treat the<br /> error cases gracefully, e.g. the error from snd_card_register() calls<br /> snd_card_free() but continues. This would lead to a UAF for the<br /> further calls like snd_usb_caiaq_control_init(), as Berk suggested in<br /> another patch in the link below.<br /> <br /> However, the problem is not only that; in general, this function drops<br /> the all error handlings (as it&amp;#39;s a void function) although its caller<br /> can propagate an error to snd_probe(), which eventually calls<br /> snd_card_free() as a proper error path. That said, we should treat<br /> each error case in setup_card(), and just return the error code<br /> promptly, which is then handled later as a fatal error in snd_probe().<br /> <br /> This patch achieves it by changing the setup_card() to return an error<br /> code. Also, the superfluous snd_card_free() call is removed, too.<br /> <br /> Note that card-&gt;private_free can be set still safely at returning an<br /> error. All called functions in card_free() have checks of the<br /> unassigned resources or NULL checks.