CVE-2026-46004
published 2026-05-27CVE-2026-46004: In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Handle probe errors properly The probe procedure of setup_card() in caiaq…
high7
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.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < da938aa9fc7826901921dcea225948ab21a97e45 | da938aa9fc7826901921dcea225948ab21a97e45 |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < 09616e25f502080ba684fc7fcf959d1376ab756d | 09616e25f502080ba684fc7fcf959d1376ab756d |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < b956e48371f2ff72b76be9a829800ecec963bd45 | b956e48371f2ff72b76be9a829800ecec963bd45 |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < f537e3ad69609f6924a4db6b4a7f6561f5288bdd | f537e3ad69609f6924a4db6b4a7f6561f5288bdd |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < 6251e3e256337a30160ef59ab1580dde4d1acd28 | 6251e3e256337a30160ef59ab1580dde4d1acd28 |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056 | e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056 |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < 096dd8519cf2f768e9e14f224b627f7aaee1a9c5 | 096dd8519cf2f768e9e14f224b627f7aaee1a9c5 |
| linux | linux | >= 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 < 28abd224db4a49560b452115bca3672a20e45b2f | 28abd224db4a49560b452115bca3672a20e45b2f |
| linux | linux_kernel | — | — |