CVE-2022-49772
ALSA: usb-audio: Drop snd_BUG_ON() from snd_usbmidi_output_open()
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 738d9edcfd44f154924692e54109fb439fcf8bdd; < c43991065f36f7628cd124e037b8750c4617a7a7 (affected, git) ≥ 738d9edcfd44f154924692e54109fb439fcf8bdd; < e7dc436aea80308a9268e6d2d85f910ff107de9b (affected, git) ≥ 738d9edcfd44f154924692e54109fb439fcf8bdd; < a80369c8ca50bc885d14386087a834659ec54a54 (affected, git) ≥ 738d9edcfd44f154924692e54109fb439fcf8bdd; < 02b94885b2fdf1808b1874e009bfb90753f8f4db (affected, git) ≥ 738d9edcfd44f154924692e54109fb439fcf8bdd; < 00f5f1bbf815a39e9eecb468d12ca55d3360eb10 (affected, git) ≥ 738d9edcfd44f154924692e54109fb439fcf8bdd; < ad72c3c3f6eb81d2cb189ec71e888316adada5df (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
4.15 (affected) ≥ 0; < 4.15 (unaffected, semver) ≥ 4.19.267; ≤ 4.19.* (unaffected, semver) ≥ 5.4.225; ≤ 5.4.* (unaffected, semver) ≥ 5.10.156; ≤ 5.10.* (unaffected, semver) ≥ 5.15.80; ≤ 5.15.* (unaffected, semver) ≥ 6.0.10; ≤ 6.0.* (unaffected, semver) ≥ 6.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/c43991065f36f7628cd124e037b8750c4617a7a7CNA: Linux
- https://git.kernel.org/stable/c/e7dc436aea80308a9268e6d2d85f910ff107de9bCNA: Linux
- https://git.kernel.org/stable/c/a80369c8ca50bc885d14386087a834659ec54a54CNA: Linux
- https://git.kernel.org/stable/c/02b94885b2fdf1808b1874e009bfb90753f8f4dbCNA: Linux
- https://git.kernel.org/stable/c/00f5f1bbf815a39e9eecb468d12ca55d3360eb10CNA: Linux
- https://git.kernel.org/stable/c/ad72c3c3f6eb81d2cb189ec71e888316adada5dfCNA: Linux
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