linux-cve-announce - CVE-2023-53197: USB: uhci: fix memory leak with using debugfs

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Message-ID: <2025091559-CVE-2023-53197-1f23@gregkh>
Date: Mon, 15 Sep 2025 16:02:51 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53197: USB: uhci: 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: uhci: 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-2023-53197 to this issue.


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

	Fixed in 5.15.100 with commit c6af1dbc99ad37bf67c8703982df4d7f12d256c1
	Fixed in 6.1.18 with commit e529aeb771aef1402c899b6b405610ef444d5d88
	Fixed in 6.2.5 with commit 9cb88847b8b86f132309030022a23dca895b6f61
	Fixed in 6.3 with commit 0a3f82c79c86278e7f144564b1cb6cc5c3657144

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-2023-53197
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/host/uhci-hcd.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/c6af1dbc99ad37bf67c8703982df4d7f12d256c1
	https://git.kernel.org/stable/c/e529aeb771aef1402c899b6b405610ef444d5d88
	https://git.kernel.org/stable/c/9cb88847b8b86f132309030022a23dca895b6f61
	https://git.kernel.org/stable/c/0a3f82c79c86278e7f144564b1cb6cc5c3657144