linux-cve-announce - CVE-2023-53424: clk: mediatek: fix of

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Message-ID: <2025091856-CVE-2023-53424-d5b6@gregkh>
Date: Thu, 18 Sep 2025 18:04:15 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53424: clk: mediatek: fix of_iomap memory leak

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

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

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

clk: mediatek: fix of_iomap memory leak

Smatch reports:
drivers/clk/mediatek/clk-mtk.c:583 mtk_clk_simple_probe() warn:
    'base' from of_iomap() not released on lines: 496.

This problem was also found in linux-next. In mtk_clk_simple_probe(),
base is not released when handling errors
if clk_data is not existed, which may cause a leak.
So free_base should be added here to release base.

The Linux kernel CVE team has assigned CVE-2023-53424 to this issue.


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

	Issue introduced in 5.15 with commit c58cd0e40ffac67961b945793876b973728f9b80 and fixed in 6.3.13 with commit 2cae6a28d8c12c597e8656962271520434c61c48
	Issue introduced in 5.15 with commit c58cd0e40ffac67961b945793876b973728f9b80 and fixed in 6.4.4 with commit 47234e19b00816a8a7b278c7173f6d4e928c43c7
	Issue introduced in 5.15 with commit c58cd0e40ffac67961b945793876b973728f9b80 and fixed in 6.5 with commit 3db7285e044144fd88a356f5b641b9cd4b231a77

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-2023-53424
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/clk/mediatek/clk-mtk.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/2cae6a28d8c12c597e8656962271520434c61c48
	https://git.kernel.org/stable/c/47234e19b00816a8a7b278c7173f6d4e928c43c7
	https://git.kernel.org/stable/c/3db7285e044144fd88a356f5b641b9cd4b231a77