| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49772: ALSA: usb-audio: Drop snd_BUG_ON() from snd_usbmidi_output_open() |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49772 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.334 with commit 872c9314769e89d8bda74ff3ac584756a45ee752 |
| Fixed in 4.14.300 with commit 368a01e5064c13946d032ab1d65ba95020a39cc5 |
| Fixed in 4.19.267 with commit c43991065f36f7628cd124e037b8750c4617a7a7 |
| Fixed in 5.4.225 with commit e7dc436aea80308a9268e6d2d85f910ff107de9b |
| Fixed in 5.10.156 with commit a80369c8ca50bc885d14386087a834659ec54a54 |
| Fixed in 5.15.80 with commit 02b94885b2fdf1808b1874e009bfb90753f8f4db |
| Fixed in 6.0.10 with commit 00f5f1bbf815a39e9eecb468d12ca55d3360eb10 |
| Fixed in 6.1 with commit ad72c3c3f6eb81d2cb189ec71e888316adada5df |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-49772 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| sound/usb/midi.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/872c9314769e89d8bda74ff3ac584756a45ee752 |
| https://git.kernel.org/stable/c/368a01e5064c13946d032ab1d65ba95020a39cc5 |
| https://git.kernel.org/stable/c/c43991065f36f7628cd124e037b8750c4617a7a7 |
| https://git.kernel.org/stable/c/e7dc436aea80308a9268e6d2d85f910ff107de9b |
| https://git.kernel.org/stable/c/a80369c8ca50bc885d14386087a834659ec54a54 |
| https://git.kernel.org/stable/c/02b94885b2fdf1808b1874e009bfb90753f8f4db |
| https://git.kernel.org/stable/c/00f5f1bbf815a39e9eecb468d12ca55d3360eb10 |
| https://git.kernel.org/stable/c/ad72c3c3f6eb81d2cb189ec71e888316adada5df |
