| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-56531: ALSA: caiaq: Use snd_card_free_when_closed() at disconnection |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: caiaq: Use snd_card_free_when_closed() at disconnection |
| |
| The USB disconnect callback is supposed to be short and not too-long |
| waiting. OTOH, the current code uses snd_card_free() at |
| disconnection, but this waits for the close of all used fds, hence it |
| can take long. It eventually blocks the upper layer USB ioctls, which |
| may trigger a soft lockup. |
| |
| An easy workaround is to replace snd_card_free() with |
| snd_card_free_when_closed(). This variant returns immediately while |
| the release of resources is done asynchronously by the card device |
| release at the last close. |
| |
| This patch also splits the code to the disconnect and the free phases; |
| the former is called immediately at the USB disconnect callback while |
| the latter is called from the card destructor. |
| |
| The Linux kernel CVE team has assigned CVE-2024-56531 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 4.19.325 with commit 3993edf44d3df7b6e8c753eac6ac8783473fcbab |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 5.4.287 with commit ebad462eec93b0f701dfe4de98990e7355283801 |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 5.10.231 with commit 4dd821dcbfcecf7af6a08370b0b217cde2818acf |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 5.15.174 with commit cadf1d8e9ddcd74584ec961aeac14ac549b261d8 |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 6.1.120 with commit 237f3faf0177bdde728fa3106d730d806436aa4d |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 6.6.64 with commit 4507a8b9b30344c5ddd8219945f446d47e966a6d |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 6.11.11 with commit dd0de8cb708951cebf727aa045e8242ba651bb52 |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 6.12.2 with commit a3f9314752dbb6f6aa1f0f2b4c58243bda800738 |
| Issue introduced in 2.6.22 with commit 523f1dce37434a9a6623bf46e7893e2b4b10ac3c and fixed in 6.13 with commit b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c |
| |
| 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-2024-56531 |
| 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/caiaq/audio.c |
| sound/usb/caiaq/audio.h |
| sound/usb/caiaq/device.c |
| sound/usb/caiaq/input.c |
| sound/usb/caiaq/input.h |
| |
| |
| 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/3993edf44d3df7b6e8c753eac6ac8783473fcbab |
| https://git.kernel.org/stable/c/ebad462eec93b0f701dfe4de98990e7355283801 |
| https://git.kernel.org/stable/c/4dd821dcbfcecf7af6a08370b0b217cde2818acf |
| https://git.kernel.org/stable/c/cadf1d8e9ddcd74584ec961aeac14ac549b261d8 |
| https://git.kernel.org/stable/c/237f3faf0177bdde728fa3106d730d806436aa4d |
| https://git.kernel.org/stable/c/4507a8b9b30344c5ddd8219945f446d47e966a6d |
| https://git.kernel.org/stable/c/dd0de8cb708951cebf727aa045e8242ba651bb52 |
| https://git.kernel.org/stable/c/a3f9314752dbb6f6aa1f0f2b4c58243bda800738 |
| https://git.kernel.org/stable/c/b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c |
