linux-cve-announce - CVE-2023-53325: drm/mediatek: dp: Change logging to dev for mtk_dp_aux

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Message-ID: <2025091644-CVE-2023-53325-a6b9@gregkh>
Date: Tue, 16 Sep 2025 18:12:10 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53325: drm/mediatek: dp: Change logging to dev for mtk_dp_aux_transfer()

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

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

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

drm/mediatek: dp: Change logging to dev for mtk_dp_aux_transfer()

Change logging from drm_{err,info}() to dev_{err,info}() in functions
mtk_dp_aux_transfer() and mtk_dp_aux_do_transfer(): this will be
essential to avoid getting NULL pointer kernel panics if any kind
of error happens during AUX transfers happening before the bridge
is attached.

This may potentially start happening in a later commit implementing
aux-bus support, as AUX transfers will be triggered from the panel
driver (for EDID) before the mtk-dp bridge gets attached, and it's
done in preparation for the same.

The Linux kernel CVE team has assigned CVE-2023-53325 to this issue.


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

	Fixed in 6.1.55 with commit 4c743c1dd2ee2a72951660b6798d4d7f7674f87b
	Fixed in 6.5.5 with commit 7839f62294039959076dd06232e07aec7f7d5b2b
	Fixed in 6.6 with commit fd70e2019bfbcb0ed90c5e23839bf510ce6acf8f

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-2023-53325
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/gpu/drm/mediatek/mtk_dp.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/4c743c1dd2ee2a72951660b6798d4d7f7674f87b
	https://git.kernel.org/stable/c/7839f62294039959076dd06232e07aec7f7d5b2b
	https://git.kernel.org/stable/c/fd70e2019bfbcb0ed90c5e23839bf510ce6acf8f