linux-cve-announce - CVE-2023-53610: irqchip: Fix refcount leak in platform_irqchip

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Message-ID: <2025100433-CVE-2023-53610-3f0f@gregkh>
Date: Sat,  4 Oct 2025 17:52:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53610: irqchip: Fix refcount leak in platform_irqchip_probe

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

irqchip: Fix refcount leak in platform_irqchip_probe

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

The Linux kernel CVE team has assigned CVE-2023-53610 to this issue.


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

	Issue introduced in 5.9 with commit f8410e626569324cfe831aaecc0504cafc12b471 and fixed in 5.10.173 with commit b00baffcc2561374f8fe8af873d00531f19864eb
	Issue introduced in 5.9 with commit f8410e626569324cfe831aaecc0504cafc12b471 and fixed in 5.15.99 with commit 4401b485855700f296cae4d0db36a52948bff4fa
	Issue introduced in 5.9 with commit f8410e626569324cfe831aaecc0504cafc12b471 and fixed in 6.1.16 with commit ea54b608d85b7536f92238f3259730fa06cb5d21
	Issue introduced in 5.9 with commit f8410e626569324cfe831aaecc0504cafc12b471 and fixed in 6.2.3 with commit c32fb16331f612e66a7fa8930164e0dc15725b72
	Issue introduced in 5.9 with commit f8410e626569324cfe831aaecc0504cafc12b471 and fixed in 6.3 with commit 6caa5a2b78f5f53c433d3a3781e53325da22f0ac

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-2023-53610
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/irqchip.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/b00baffcc2561374f8fe8af873d00531f19864eb
	https://git.kernel.org/stable/c/4401b485855700f296cae4d0db36a52948bff4fa
	https://git.kernel.org/stable/c/ea54b608d85b7536f92238f3259730fa06cb5d21
	https://git.kernel.org/stable/c/c32fb16331f612e66a7fa8930164e0dc15725b72
	https://git.kernel.org/stable/c/6caa5a2b78f5f53c433d3a3781e53325da22f0ac