Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before da938aa9fc7826901921dcea225948ab21a97e45; affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before 09616e25f502080ba684fc7fcf959d1376ab756d; affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before b956e48371f2ff72b76be9a829800ecec963bd45; affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before f537e3ad69609f6924a4db6b4a7f6561f5288bdd; affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before 6251e3e256337a30160ef59ab1580dde4d1acd28; affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056; affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before 096dd8519cf2f768e9e14f224b627f7aaee1a9c5; affected 8e3cd08ed8e590952aa9a656758cb24d4ba898f8 before 28abd224db4a49560b452115bca3672a20e45b2f |
| Linux / Linux | affected 2.6.25; unaffected 0 before 2.6.25; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.86 through 6.12.*; unaffected 6.18.27 through 6.18.*; unaffected 7.0.4 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/da938aa9fc7826901921dcea225948ab21a97e45
- https://git.kernel.org/stable/c/09616e25f502080ba684fc7fcf959d1376ab756d
- https://git.kernel.org/stable/c/b956e48371f2ff72b76be9a829800ecec963bd45
- https://git.kernel.org/stable/c/f537e3ad69609f6924a4db6b4a7f6561f5288bdd
- https://git.kernel.org/stable/c/6251e3e256337a30160ef59ab1580dde4d1acd28
- https://git.kernel.org/stable/c/e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056
- https://git.kernel.org/stable/c/096dd8519cf2f768e9e14f224b627f7aaee1a9c5
- https://git.kernel.org/stable/c/28abd224db4a49560b452115bca3672a20e45b2f