| 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-2024-44954: ALSA: line6: Fix racy access to midibuf |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: line6: Fix racy access to midibuf |
| |
| There can be concurrent accesses to line6 midibuf from both the URB |
| completion callback and the rawmidi API access. This could be a cause |
| of KMSAN warning triggered by syzkaller below (so put as reported-by |
| here). |
| |
| This patch protects the midibuf call of the former code path with a |
| spinlock for avoiding the possible races. |
| |
| The Linux kernel CVE team has assigned CVE-2024-44954 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.320 with commit 643293b68fbb6c03f5e907736498da17d43f0d81 |
| Fixed in 5.4.282 with commit 40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5 |
| Fixed in 5.10.224 with commit e7e7d2b180d8f297cea6db43ea72402fd33e1a29 |
| Fixed in 5.15.165 with commit a54da4b787dcac60b598da69c9c0072812b8282d |
| Fixed in 6.1.105 with commit c80f454a805443c274394b1db0d1ebf477abd94e |
| Fixed in 6.6.46 with commit 535df7f896a568a8a1564114eaea49d002cb1747 |
| Fixed in 6.10.5 with commit 51d87f11dd199bbc6a85982b088ff27bde53b48a |
| Fixed in 6.11 with commit 15b7a03205b31bc5623378c190d22b7ff60026f1 |
| |
| 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-2024-44954 |
| 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/line6/driver.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/643293b68fbb6c03f5e907736498da17d43f0d81 |
| https://git.kernel.org/stable/c/40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5 |
| https://git.kernel.org/stable/c/e7e7d2b180d8f297cea6db43ea72402fd33e1a29 |
| https://git.kernel.org/stable/c/a54da4b787dcac60b598da69c9c0072812b8282d |
| https://git.kernel.org/stable/c/c80f454a805443c274394b1db0d1ebf477abd94e |
| https://git.kernel.org/stable/c/535df7f896a568a8a1564114eaea49d002cb1747 |
| https://git.kernel.org/stable/c/51d87f11dd199bbc6a85982b088ff27bde53b48a |
| https://git.kernel.org/stable/c/15b7a03205b31bc5623378c190d22b7ff60026f1 |
