Description
In the Linux kernel, the following vulnerability has been resolved: sound: ua101: fix division by zero at probe Add a missing sanity check for bNrChannels in detect_usb_format() to prevent a division by zero in playback_urb_complete() and capture_urb_complete(). USB core does not validate class-specific descriptor fields such as bNrChannels, so drivers must verify them before use. If a device provides bNrChannels = 0, frame_bytes becomes zero and is later used as a divisor in the URB completion handlers, leading to a kernel crash.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/0ff2b713f406e9ecadb406014d74e7a020ac12b1 Patch
- git.kernel.org/stable/c/593dd7e6c890d8e4ca21b3e2f796b7cb8e8da983 Patch
- git.kernel.org/stable/c/6162e8212e88c39492d981b248b5e37002486c66 Patch
- git.kernel.org/stable/c/66d9c2ed081f299cfb201d9e9c4faf920e56e0bf Patch
- git.kernel.org/stable/c/aae1498c59f48d03ee358df84f07a5af9885f827 Patch
- git.kernel.org/stable/c/d1f73f169c1014463b5060e3f60813e13ddc7b87 Patch
- git.kernel.org/stable/c/e02897c5b041c9b980055fa9a6167023d6dc5caf Patch
- git.kernel.org/stable/c/f1862dbf09080254c52175a448290c784dd7d3de Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 15 November 2026
- CWE
- CWE-369
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