linux-cve-announce - CVE-2023-53359: USB: fix memory leak with using debugfs

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Message-ID: <2025091722-CVE-2023-53359-0569@gregkh>
Date: Wed, 17 Sep 2025 16:56:58 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53359: USB: 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: 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-2023-53359 to this issue.


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

	Fixed in 5.15.100 with commit 6683327b51a601daba32900072349dfa1d4e8fea
	Fixed in 6.1.18 with commit c68ece7baf2aa9783b8244482c03010d477d4a93
	Fixed in 6.2.5 with commit cc00340fb1226a2a3a5cf15473ac417da3c952f1
	Fixed in 6.3 with commit 30374434edab20e25776f8ecb4bc9d1e54309487

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-2023-53359
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/core/usb.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/6683327b51a601daba32900072349dfa1d4e8fea
	https://git.kernel.org/stable/c/c68ece7baf2aa9783b8244482c03010d477d4a93
	https://git.kernel.org/stable/c/cc00340fb1226a2a3a5cf15473ac417da3c952f1
	https://git.kernel.org/stable/c/30374434edab20e25776f8ecb4bc9d1e54309487