linux-cve-announce - CVE-2022-49466: regulator: scmi: Fix refcount leak in scmi_regulator

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Message-ID: <2025022601-CVE-2022-49466-d3cd@gregkh>
Date: Wed, 26 Feb 2025 03:12:20 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49466: regulator: scmi: Fix refcount leak in scmi_regulator_probe

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

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

regulator: scmi: Fix refcount leak in scmi_regulator_probe

of_find_node_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

The Linux kernel CVE team has assigned CVE-2022-49466 to this issue.


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

	Issue introduced in 5.11 with commit 0fbeae70ee7ce98e18a47337cd1f205dd88589e9 and fixed in 5.15.46 with commit 9ebbfa73d69909b7c737f599fd4ebd42318fc881
	Issue introduced in 5.11 with commit 0fbeae70ee7ce98e18a47337cd1f205dd88589e9 and fixed in 5.17.14 with commit 299a002161c7bfb72e99ba45e5b660aecc344ea0
	Issue introduced in 5.11 with commit 0fbeae70ee7ce98e18a47337cd1f205dd88589e9 and fixed in 5.18.3 with commit 4a59c763ef9b68c711dc2fd2ef4a6648da5480ee
	Issue introduced in 5.11 with commit 0fbeae70ee7ce98e18a47337cd1f205dd88589e9 and fixed in 5.19 with commit 68d6c8476fd4f448e70e0ab31ff972838ac41dae

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-2022-49466
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/regulator/scmi-regulator.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/9ebbfa73d69909b7c737f599fd4ebd42318fc881
	https://git.kernel.org/stable/c/299a002161c7bfb72e99ba45e5b660aecc344ea0
	https://git.kernel.org/stable/c/4a59c763ef9b68c711dc2fd2ef4a6648da5480ee
	https://git.kernel.org/stable/c/68d6c8476fd4f448e70e0ab31ff972838ac41dae