linux-cve-announce - CVE-2023-53405: USB: gadget: gr_udc: fix memory leak with using debugfs

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Message-ID: <2025091801-CVE-2023-53405-885a@gregkh>
Date: Thu, 18 Sep 2025 15:59:02 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53405: USB: gadget: gr_udc: fix memory leak with using debugfs_lookup()

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

USB: gadget: gr_udc: 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.

The Linux kernel CVE team has assigned CVE-2023-53405 to this issue.


Affected and fixed versions
===========================

	Fixed in 5.15.100 with commit 30f9ba2396a1130eef7f2d3ee7ee8037b7c25be9
	Fixed in 6.1.18 with commit be21a66e17ee0ab5f3513b6c86659e60cec5e981
	Fixed in 6.2.5 with commit 0933eca15f5223b5c2412080c8c3de8758465c78
	Fixed in 6.3 with commit 73f4451368663ad28daa67980c6dd11d83b303eb

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2023-53405
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/usb/gadget/udc/gr_udc.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/30f9ba2396a1130eef7f2d3ee7ee8037b7c25be9
	https://git.kernel.org/stable/c/be21a66e17ee0ab5f3513b6c86659e60cec5e981
	https://git.kernel.org/stable/c/0933eca15f5223b5c2412080c8c3de8758465c78
	https://git.kernel.org/stable/c/73f4451368663ad28daa67980c6dd11d83b303eb