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CVE-2025-40314
usb: cdns3: gadget: Use-after-free during failed initialization and exit of cdnsp gadget
Description

In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: Use-after-free during failed initialization and exit of cdnsp gadget In the __cdnsp_gadget_init() and cdnsp_gadget_exit() functions, the gadget structure (pdev->gadget) was freed before its endpoints. The endpoints are linked via the ep_list in the gadget structure. Freeing the gadget first leaves dangling pointers in the endpoint list. When the endpoints are subsequently freed, this results in a use-after-free. Fix: By separating the usb_del_gadget_udc() operation into distinct "del" and "put" steps, cdnsp_gadget_free_endpoints() can be executed prior to the final release of the gadget structure with usb_put_gadget(). A patch similar to bb9c74a5bd14("usb: dwc3: gadget: Free gadget structure only after freeing endpoints").

INFO

Published Date :

Dec. 8, 2025, 1:16 a.m.

Last Modified :

Dec. 8, 2025, 1:16 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-40314 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Resolve use-after-free by ensuring endpoints are freed before the gadget structure.
  • Separate usb_del_gadget_udc into distinct "del" and "put" steps.
  • Execute cdnsp_gadget_free_endpoints() before usb_put_gadget().
  • Apply the provided kernel patch.
  • Update the Linux kernel.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-40314.

URL Resource
https://git.kernel.org/stable/c/0cf9a50af91fbdac3849f8d950e883a3eaa3ecea
https://git.kernel.org/stable/c/37158ce6ba964b62d1e3eebd11f03c6900a52dd1
https://git.kernel.org/stable/c/87c5ff5615dc0a37167e8faf3adeeddc6f1344a3
https://git.kernel.org/stable/c/9c52f01429c377a2d32cafc977465f37b5384f77
https://git.kernel.org/stable/c/ea37884097a0931abb8e11e40eacfb25e9fdb5e9
https://git.kernel.org/stable/c/fdf573c517627a96f5040f988e9b21267806be5c
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-40314 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-40314 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-40314 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-40314 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Dec. 08, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: Use-after-free during failed initialization and exit of cdnsp gadget In the __cdnsp_gadget_init() and cdnsp_gadget_exit() functions, the gadget structure (pdev->gadget) was freed before its endpoints. The endpoints are linked via the ep_list in the gadget structure. Freeing the gadget first leaves dangling pointers in the endpoint list. When the endpoints are subsequently freed, this results in a use-after-free. Fix: By separating the usb_del_gadget_udc() operation into distinct "del" and "put" steps, cdnsp_gadget_free_endpoints() can be executed prior to the final release of the gadget structure with usb_put_gadget(). A patch similar to bb9c74a5bd14("usb: dwc3: gadget: Free gadget structure only after freeing endpoints").
    Added Reference https://git.kernel.org/stable/c/0cf9a50af91fbdac3849f8d950e883a3eaa3ecea
    Added Reference https://git.kernel.org/stable/c/37158ce6ba964b62d1e3eebd11f03c6900a52dd1
    Added Reference https://git.kernel.org/stable/c/87c5ff5615dc0a37167e8faf3adeeddc6f1344a3
    Added Reference https://git.kernel.org/stable/c/9c52f01429c377a2d32cafc977465f37b5384f77
    Added Reference https://git.kernel.org/stable/c/ea37884097a0931abb8e11e40eacfb25e9fdb5e9
    Added Reference https://git.kernel.org/stable/c/fdf573c517627a96f5040f988e9b21267806be5c
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.