linux-cve-announce - CVE-2023-53409: drivers: base: component: fix memory leak with using debugfs

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Message-ID: <2025091801-CVE-2023-53409-818d@gregkh>
Date: Thu, 18 Sep 2025 15:59:06 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53409: drivers: base: component: 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:

drivers: base: component: 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-2023-53409 to this issue.


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

	Fixed in 5.15.100 with commit 09709a49283f79184c998d6dafcc01590e4d654d
	Fixed in 6.1.18 with commit 79ac2b01e033181e21cc84216ace1f4160eb8950
	Fixed in 6.2.5 with commit bf0fd01c7cc1061fb2cfda3e2044371642108e6c
	Fixed in 6.3 with commit 8deb87b1e810dd558371e88ffd44339fbef27870

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-2023-53409
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/base/component.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/09709a49283f79184c998d6dafcc01590e4d654d
	https://git.kernel.org/stable/c/79ac2b01e033181e21cc84216ace1f4160eb8950
	https://git.kernel.org/stable/c/bf0fd01c7cc1061fb2cfda3e2044371642108e6c
	https://git.kernel.org/stable/c/8deb87b1e810dd558371e88ffd44339fbef27870