CVE-2022-49772
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Drop snd_BUG_ON() from snd_usbmidi_output_open() snd_usbmidi_output_open() has a check of the NULL port with snd_BUG_ON(). snd_BUG_ON() was used as this shouldn't have happened, but in reality, the NULL port may be seen when the device gives an invalid endpoint setup at the descriptor, hence the driver skips the allocation. That is, the check itself is valid and snd_BUG_ON() should be dropped from there. Otherwise it's confusing as if it were a real bug, as recently syzbot stumbled on it.
How to fix
- linux linux_kernel4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.156, 5.15.80, 6.0.10 or later
- git.kernel.org/stable/c/00f5f1bbf815a39e9eecb468d12ca55d3360eb10
- git.kernel.org/stable/c/02b94885b2fdf1808b1874e009bfb90753f8f4db
- git.kernel.org/stable/c/a80369c8ca50bc885d14386087a834659ec54a54
- git.kernel.org/stable/c/ad72c3c3f6eb81d2cb189ec71e888316adada5df
- git.kernel.org/stable/c/c43991065f36f7628cd124e037b8750c4617a7a7
- git.kernel.org/stable/c/e7dc436aea80308a9268e6d2d85f910ff107de9b
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 4.9.334, 4.10 ≤ v < 4.14.300, 4.15 ≤ v < 4.19.267, 4.20 ≤ v < 5.4.225, 5.5 ≤ v < 5.10.156, 5.11 ≤ v < 5.15.80, 5.16 ≤ v < 6.0.10, 6.1 | 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.156, 5.15.80, 6.0.10 |
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