CVE-2026-46184
Analyzed Analyzed - Analysis Complete
Division by Zero in Linux Kernel USB Audio Driver

Publication date: 2026-05-28

Last updated on: 2026-06-11

Assigner: kernel.org

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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-28
Last Modified
2026-06-11
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-46184
EUVD
EUVD-2026-32811
Affected Vendors & Products
Showing 8 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.1
linux linux_kernel From 6.13 (inc) to 6.18.30 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.175 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.209 (exc)
linux linux_kernel From 6.19 (inc) to 7.0.7 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.88 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.140 (exc)
linux linux_kernel From 2.6.34 (inc) to 5.10.258 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-369 The product divides a value by zero.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in the Linux kernel sound subsystem, specifically in the ua101 driver. It occurs because the driver does not properly check the value of bNrChannels, a field that indicates the number of audio channels. If a USB device reports bNrChannels as zero, the driver uses this value in a division operation without validation, causing a division by zero error. This leads to a kernel crash during audio playback or capture.

Impact Analysis

The impact of this vulnerability is a potential kernel crash on a Linux system using the affected ua101 sound driver. An attacker or a malicious USB device could exploit this by providing a crafted descriptor with bNrChannels set to zero, causing the system to crash. This could lead to denial of service, requiring a system reboot and potentially causing data loss or disruption of services.

Mitigation Strategies

The vulnerability is caused by a missing sanity check for the bNrChannels field in the Linux kernel sound driver ua101, which can lead to a division by zero and kernel crash.

Immediate mitigation steps include updating the Linux kernel to a version where this issue is fixed, as the patch adds a check to prevent bNrChannels from being zero before performing division.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-46184. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart