CVE-2025-38105
In the Linux kernel, the following vulnerability has been resolved:
ALSA: usb-audio: Kill timer properly at removal
The USB-audio MIDI code initializes the timer, but in a rare case, the driver might be freed without the disconnect call. This leaves the timer in an active state while the assigned object is released via snd_usbmidi_free(), which ends up with a kernel warning when the debug configuration is enabled, as spotted by fuzzer.
For avoiding the problem, put timer_shutdown_sync() at snd_usbmidi_free(), so that the timer can be killed properly. While we're at it, replace the existing timer_delete_sync() at the disconnect callback with timer_shutdown_sync(), too.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 2.6.14 | 6.6.111 |
| linux / linux_kernel | 6.7 | 6.12.52 |
| linux / linux_kernel | 6.13 | 6.15.3 |
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