linux-cve-announce - CVE-2022-49415: ipmi:ipmb: Fix refcount leak in ipmi_ipmb

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Message-ID: <2025022653-CVE-2022-49415-8762@gregkh>
Date: Wed, 26 Feb 2025 03:11:29 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49415: ipmi:ipmb: Fix refcount leak in ipmi_ipmb_probe

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

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

ipmi:ipmb: Fix refcount leak in ipmi_ipmb_probe

of_parse_phandle() 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-2022-49415 to this issue.


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

	Issue introduced in 5.18 with commit 00d93611f00219bd142aa119c5121793cac30ff0 and fixed in 5.18.3 with commit f22068357acc268148bd55ce77f0a3e5c86701b4
	Issue introduced in 5.18 with commit 00d93611f00219bd142aa119c5121793cac30ff0 and fixed in 5.19 with commit a508e33956b538e034ed5df619a73ec7c15bda72

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-2022-49415
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/char/ipmi/ipmi_ipmb.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/f22068357acc268148bd55ce77f0a3e5c86701b4
	https://git.kernel.org/stable/c/a508e33956b538e034ed5df619a73ec7c15bda72