linux-cve-announce - CVE-2022-49591: net: dsa: microchip: ksz

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Message-ID: <2025022610-CVE-2022-49591-68c7@gregkh>
Date: Wed, 26 Feb 2025 03:22:34 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49591: net: dsa: microchip: ksz_common: Fix refcount leak bug

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

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

net: dsa: microchip: ksz_common: Fix refcount leak bug

In ksz_switch_register(), we should call of_node_put() for the
reference returned by of_get_child_by_name() which has increased
the refcount.

The Linux kernel CVE team has assigned CVE-2022-49591 to this issue.


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

	Issue introduced in 5.9 with commit 912aae27c6af6605eae967ab540c5e26bd76d421 and fixed in 5.15.58 with commit 88ec2ff42da3ac93b2437dc52fe25cd4372148e6
	Issue introduced in 5.9 with commit 912aae27c6af6605eae967ab540c5e26bd76d421 and fixed in 5.18.15 with commit 4165e02716518bbbe9c9104b39530d40928bc7ce
	Issue introduced in 5.9 with commit 912aae27c6af6605eae967ab540c5e26bd76d421 and fixed in 5.19 with commit a14bd7475452c51835dd5a0cee4c8fa48dd0b539

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-2022-49591
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/microchip/ksz_common.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/88ec2ff42da3ac93b2437dc52fe25cd4372148e6
	https://git.kernel.org/stable/c/4165e02716518bbbe9c9104b39530d40928bc7ce
	https://git.kernel.org/stable/c/a14bd7475452c51835dd5a0cee4c8fa48dd0b539