In the Linux kernel, a vulnerability has been identified that involves a spin lock/unlock mismatch within the usb: dwc2 gadget driver. This issue arises when the function dwc2_hsotg_udc_stop() calls another function, dwc2_gadget_exit_clock_gating(), without properly holding a required lock. This can lead to undefined behavior, including potential deadlocks in system operation.
Currently, the severity of this vulnerability is classified as unknown, indicating that its real-world impact may not yet be fully understood. The exploitation status is also low, as there are no confirmed public exploits or known active exploitations. Nevertheless, organizations should remain vigilant in monitoring this issue.
Risk to organizations includes potential system instability and deadlocks, particularly in environments reliant on the affected usb: dwc2 gadget driver. Given the low likelihood of exploitation as per current data, organizations are advised to monitor ongoing developments and apply patches as they become available.
Organizations should prioritize patching immediately once a fix is released to mitigate any risks associated with this vulnerability.
Vulnerability Details
The specific vulnerability has been described as follows: In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop(). The root cause of this vulnerability is a failure to properly manage locking mechanisms while accessing shared resources within the driver code.
The publication date of this vulnerability is May 1, 2026. No official CVSS score has been assigned, and the CWE classification is not available.
Technical Analysis
The root cause of the vulnerability lies in the incorrect management of locks during the execution of the dwc2_hsotg_udc_stop() function. When this function is called, it does not hold the hsotg->lock, which is required for the subsequent call to dwc2_gadget_exit_clock_gating(). This creates a situation where the function attempts to perform a spin_unlock on a lock that is not held, leading to undefined behavior.
The attack vector is considered low since the vulnerability does not expose a direct method for exploitation without prior access to the system. Furthermore, no user interaction is required for the vulnerability to manifest, and it impacts the confidentiality and integrity of the system.
Risk & Impact Analysis
The deployment risk associated with this vulnerability is moderate, primarily affecting systems that utilize the affected usb: dwc2 gadget driver. The potential blast radius is limited, as the vulnerability is tied to specific functionality within the Linux kernel.
While the current analysis indicates that the exploitation likelihood is low, organizations should still remain aware of the vulnerability's existence and prepare for timely remediation once a patch is made available.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
At this time, specific affected versions of the Linux kernel are not disclosed, but it is advisable to consider all versions prior to the patch release as potentially vulnerable.
Mitigation & Remediation
Organizations should prioritize patching immediately once a fix is released. It is essential to stay updated with the Linux kernel security advisories to manage and mitigate any vulnerabilities.
Detection Guidance
Monitoring system logs for unusual behavior or deadlocks may provide insight into potential exploitation attempts. Additionally, tracking changes to the dwc2 gadget driver may signify attempted intrusions.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of diligent lock management in system drivers, especially in complex environments like the Linux kernel. Security teams should ensure that proper coding practices are adhered to during driver development to prevent similar vulnerabilities.
Organizations may benefit from a thorough review of their drivers and related code to identify potential vulnerabilities proactively. Continuous penetration testing can aid in revealing such issues before they are exploited.
For more information on security best practices, organizations are encouraged to refer to the penetration testing methodology and implement a robust security framework.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)