Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Add sanity check for OOB writes at silencing At silencing the playback URB packets in the implicit fb mode before the actual playback, we blindly assume that the received packets fit with the buffer size. But when the setup in the capture stream differs from the playback stream (e.g. due to the USB core limitation of max packet size), such an inconsistency may lead to OOB writes to the buffer, resulting in a crash. For addressing it, add a sanity check of the transfer buffer size at prepare_silent_urb(), and stop the data copy if the received data overflows. Also, report back the transfer error properly from there, too. Note that this doesn't fix the root cause of the playback error itself, but this merely covers the kernel Oops.
Affected products
linux: linux kernel
References7
- git.kernel.org/stable/c/6af16f1b8649df4c00d6ced924bdd8b72c885b6a Patch
- git.kernel.org/stable/c/780dc57794a217b49994fa1d0b42465fb10a00aa Patch
- git.kernel.org/stable/c/8995fc0e00b3fee9bf7ecb3d836b635b730c1049 Patch
- git.kernel.org/stable/c/ccaf9296763be4f76b59e2cac377006016c34435 Patch
- git.kernel.org/stable/c/fa01973bb79d70c4736b6a4b2de99fbb2cbc8d1f Patch
- git.kernel.org/stable/c/fba2105a157fffcf19825e4eea498346738c9948 Patch
- git.kernel.org/stable/c/fc9e5af60dc199051dc202ae78e1fe76a9977a5e Patch
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-787
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