CVE-2026-31754

System crash via uncleared gadget state

Published May 1, 2026 · Updated May 1, 2026

Denial of service in the Linux Kernel cdns3 gadget driver allows local users to crash the system through a USB role switch. After cdns3_gadget_start() fails, hardware remains in gadget mode while software stays INACTIVE, causing cdns_role_stop() to skip cleanup before host setup. The crash requires local write access to the USB role-switch sysfs control on a system using the affected Cadence DRD hardware.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux Kernel cdns3 gadget driver allows local users to crash the system through a USB role switch. After cdns3_gadget_start() fails, hardware remains in gadget mode while software stays INACTIVE, causing cdns_role_stop() to skip cleanup before host setup. The crash requires local write access to the USB role-switch sysfs control on a system using the affected Cadence DRD hardware.

The record

CVE
CVE-2026-31754
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4
  2. Affected versionversion=7733f6c32e36ff9d7adadf40001039bf219b1cbe <5a85599ca4d2584d89dc69f4fc49303b75a42338
  3. Affected versionversion=7733f6c32e36ff9d7adadf40001039bf219b1cbe <9b1d301fbae837bf6979a19030b81d869bb15f7a
  4. Affected versionversion=7733f6c32e36ff9d7adadf40001039bf219b1cbe <b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f
  5. Affected versionversion=7733f6c32e36ff9d7adadf40001039bf219b1cbe <c32f8748d70c8fc77676ad92ed76cede17bf2c48
  6. Affected versionversion=7733f6c32e36ff9d7adadf40001039bf219b1cbe <c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f
  7. Affected versionversion=7733f6c32e36ff9d7adadf40001039bf219b1cbe <cfca84f5986afceb63a3adf39d4a98e915aebbc2
  8. Affected versionversion=7733f6c32e36ff9d7adadf40001039bf219b1cbe <fb7110a052467098967284ef14d306810b354937

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.4; version=7733f6c32e36ff9d7adadf40001039bf219b1cbe <5a85599ca4d2584d89dc69f4fc49303b75a42338; version=7733f6c32e36ff9d7adadf40001039bf219b1cbe <9b1d301fbae837bf6979a19030b81d869bb15f7a; version=7733f6c32e36ff9d7adadf40001039bf219b1cbe <b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f; version=7733f6c32e36ff9d7adadf40001039bf219b1cbe <c32f8748d70c8fc77676ad92ed76cede17bf2c48; version=7733f6c32e36ff9d7adadf40001039bf219b1cbe <c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f; version=7733f6c32e36ff9d7adadf40001039bf219b1cbe <cfca84f5986afceb63a3adf39d4a98e915aebbc2; version=7733f6c32e36ff9d7adadf40001039bf219b1cbe <fb7110a052467098967284ef14d306810b354937

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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