linux-cve-announce - CVE-2022-49240: ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev

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Message-ID: <2025022624-CVE-2022-49240-c047@gregkh>
Date: Wed, 26 Feb 2025 02:57:25 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49240: ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev_probe

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

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

ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev_probe

The device_node pointer is returned by of_parse_phandle()  with refcount
incremented. We should use of_node_put() on it when done.

This function only calls of_node_put() in the regular path.
And it will cause refcount leak in error path.

The Linux kernel CVE team has assigned CVE-2022-49240 to this issue.


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

	Issue introduced in 5.17 with commit 082482a5022780d42180a394fe6843e71fe963d8 and fixed in 5.17.2 with commit c652f8f0875b569f8afa80b8cf9762828fd6187b
	Issue introduced in 5.17 with commit 082482a5022780d42180a394fe6843e71fe963d8 and fixed in 5.18 with commit c4b7174fe5bb875a09a78674a14a1589d1a672f3

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-2022-49240
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:
	sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.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/c652f8f0875b569f8afa80b8cf9762828fd6187b
	https://git.kernel.org/stable/c/c4b7174fe5bb875a09a78674a14a1589d1a672f3