linux-cve-announce - CVE-2023-53170: net: dsa: Removed unneeded of_node_put in felix_parse_ports

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Message-ID: <2025091554-CVE-2023-53170-d187@gregkh>
Date: Mon, 15 Sep 2025 16:02:24 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53170: net: dsa: Removed unneeded of_node_put in felix_parse_ports_node

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

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

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

net: dsa: Removed unneeded of_node_put in felix_parse_ports_node

Remove unnecessary of_node_put from the continue path to prevent
child node from being released twice, which could avoid resource
leak or other unexpected issues.

The Linux kernel CVE team has assigned CVE-2023-53170 to this issue.


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

	Issue introduced in 6.3 with commit de879a016a94a670fafeb3eb03b3d5803d81ab37 and fixed in 6.4.5 with commit 7ead10b44b79ce8bfcd51e749d54e009de5f511a
	Issue introduced in 6.3 with commit de879a016a94a670fafeb3eb03b3d5803d81ab37 and fixed in 6.5 with commit 04499f28b40bfc24f20b0e2331008bb90a54a6cf

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-2023-53170
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/net/dsa/ocelot/felix.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/7ead10b44b79ce8bfcd51e749d54e009de5f511a
	https://git.kernel.org/stable/c/04499f28b40bfc24f20b0e2331008bb90a54a6cf