linux-cve-announce - CVE-2022-49717: irqchip/apple-aic: Fix refcount leak in build_fiq

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Message-ID: <2025022632-CVE-2022-49717-acc7@gregkh>
Date: Wed, 26 Feb 2025 03:24:40 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49717: irqchip/apple-aic: Fix refcount leak in build_fiq_affinity

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

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

irqchip/apple-aic: Fix refcount leak in build_fiq_affinity

of_find_node_by_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

The Linux kernel CVE team has assigned CVE-2022-49717 to this issue.


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

	Issue introduced in 5.18 with commit a5e8801202b318622ea526aa5625e5f7eceb4d26 and fixed in 5.18.6 with commit 2dc14cebe5dc053434b507bb24e6821cb795050f
	Issue introduced in 5.18 with commit a5e8801202b318622ea526aa5625e5f7eceb4d26 and fixed in 5.19 with commit b1ac803f47cb1615468f35cf1ccb553c52087301

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-2022-49717
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/irqchip/irq-apple-aic.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/2dc14cebe5dc053434b507bb24e6821cb795050f
	https://git.kernel.org/stable/c/b1ac803f47cb1615468f35cf1ccb553c52087301