Bug 2482560 (CVE-2026-46184)

Summary: CVE-2026-46184 kernel: sound: ua101: fix division by zero at probe
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's `ua101` USB audio driver. A local attacker, by connecting a specially crafted USB audio device, could trigger a division-by-zero error. This occurs because the driver fails to validate the `bNrChannels` field, leading to a kernel crash. This vulnerability results in a Denial of Service (DoS) for the affected system.
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Description OSIDB Bzimport 2026-05-28 11:03:17 UTC 
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.
Comment 1 Keith Grant 2026-05-28 14:27:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052830-CVE-2026-46184-4e52@gregkh/T