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.
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/00f5f1bbf815a39e9eecb468d12ca55d3360eb10 Patch
- git.kernel.org/stable/c/02b94885b2fdf1808b1874e009bfb90753f8f4db Patch
- git.kernel.org/stable/c/a80369c8ca50bc885d14386087a834659ec54a54 Patch
- git.kernel.org/stable/c/ad72c3c3f6eb81d2cb189ec71e888316adada5df Patch
- git.kernel.org/stable/c/c43991065f36f7628cd124e037b8750c4617a7a7 Patch
- git.kernel.org/stable/c/e7dc436aea80308a9268e6d2d85f910ff107de9b Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 10 · as of 7 November 2026
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