Bug 2396466 (CVE-2023-53415)

Summary: CVE-2023-53415 kernel: USB: dwc3: fix memory leak with using debugfs_lookup()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-09-18 15:02:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

USB: dwc3: fix memory leak with using debugfs_lookup()

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.

Note, the root dentry for the debugfs directory for the device needs to
be saved so we don't have to keep looking it up, which required a bit
more refactoring to properly create and remove it when needed.
Comment 1 Keith Grant 2025-09-18 17:54:49 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091802-CVE-2023-53415-ea27@gregkh/T