| 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-2025-21835: usb: gadget: f_midi: fix MIDI Streaming descriptor lengths |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: gadget: f_midi: fix MIDI Streaming descriptor lengths |
| |
| While the MIDI jacks are configured correctly, and the MIDIStreaming |
| endpoint descriptors are filled with the correct information, |
| bNumEmbMIDIJack and bLength are set incorrectly in these descriptors. |
| |
| This does not matter when the numbers of in and out ports are equal, but |
| when they differ the host will receive broken descriptors with |
| uninitialized stack memory leaking into the descriptor for whichever |
| value is smaller. |
| |
| The precise meaning of "in" and "out" in the port counts is not clearly |
| defined and can be confusing. But elsewhere the driver consistently |
| uses this to match the USB meaning of IN and OUT viewed from the host, |
| so that "in" ports send data to the host and "out" ports receive data |
| from it. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21835 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 5.4.291 with commit 3a983390d14e8498f303fc5cb23ab7d696b815db |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 5.10.235 with commit 9f36a89dcb78cb7e37f487b04a16396ac18c0636 |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 5.15.179 with commit d8e86700c8a8cf415e300a0921acd6a8f9b494f8 |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 6.1.129 with commit 9f6860a9c11301b052225ca8825f8d2b1a5825bf |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 6.6.79 with commit 6ae6dee9f005a2f3b739b85abb6f14a0935699e0 |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 6.12.16 with commit 6b16761a928796e4b49e89a0b1ac284155172726 |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 6.13.4 with commit a2d0694e1f111379c1efdf439dadd3cfd959fe9d |
| Issue introduced in 3.2 with commit c8933c3f79568263c90a46f06cf80419e6c63c97 and fixed in 6.14 with commit da1668997052ed1cb00322e1f3b63702615c9429 |
| |
| 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-2025-21835 |
| 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: |
| drivers/usb/gadget/function/f_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/3a983390d14e8498f303fc5cb23ab7d696b815db |
| https://git.kernel.org/stable/c/9f36a89dcb78cb7e37f487b04a16396ac18c0636 |
| https://git.kernel.org/stable/c/d8e86700c8a8cf415e300a0921acd6a8f9b494f8 |
| https://git.kernel.org/stable/c/9f6860a9c11301b052225ca8825f8d2b1a5825bf |
| https://git.kernel.org/stable/c/6ae6dee9f005a2f3b739b85abb6f14a0935699e0 |
| https://git.kernel.org/stable/c/6b16761a928796e4b49e89a0b1ac284155172726 |
| https://git.kernel.org/stable/c/a2d0694e1f111379c1efdf439dadd3cfd959fe9d |
| https://git.kernel.org/stable/c/da1668997052ed1cb00322e1f3b63702615c9429 |
