linux-cve-announce - CVE-2023-53412: USB: gadget: bcm63xx_udc: fix memory leak with using debugfs

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Message-ID: <2025091802-CVE-2023-53412-cbd2@gregkh>
Date: Thu, 18 Sep 2025 15:59:09 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53412: USB: gadget: bcm63xx_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: bcm63xx_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-2023-53412 to this issue.


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

	Fixed in 5.15.100 with commit b0a2663ecbe8f65cd3bab2b34dd90156ceb0dbb8
	Fixed in 6.1.18 with commit 31de0b70ae5661a407e9d578bbc41de2d83ac25d
	Fixed in 6.2.5 with commit f30c7046dfa2748520a8045bb43ed2fbca0373b5
	Fixed in 6.3 with commit a91c99b1fe5c6f7e52fb932ad9e57ec7cfe913ec

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-2023-53412
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/bcm63xx_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/b0a2663ecbe8f65cd3bab2b34dd90156ceb0dbb8
	https://git.kernel.org/stable/c/31de0b70ae5661a407e9d578bbc41de2d83ac25d
	https://git.kernel.org/stable/c/f30c7046dfa2748520a8045bb43ed2fbca0373b5
	https://git.kernel.org/stable/c/a91c99b1fe5c6f7e52fb932ad9e57ec7cfe913ec