linux-cve-announce - CVE-2023-53837: drm/msm: fix NULL-deref on snapshot tear down

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Message-ID: <2025120956-CVE-2023-53837-2bf8@gregkh>
Date: Tue,  9 Dec 2025 10:31:21 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53837: drm/msm: fix NULL-deref on snapshot tear down

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

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

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

drm/msm: fix NULL-deref on snapshot tear down

In case of early initialisation errors and on platforms that do not use
the DPU controller, the deinitilisation code can be called with the kms
pointer set to NULL.

Patchwork: https://patchwork.freedesktop.org/patch/525099/

The Linux kernel CVE team has assigned CVE-2023-53837 to this issue.


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

	Issue introduced in 5.14 with commit 98659487b845c05b6bed85d881713545db674c7c and fixed in 5.15.112 with commit 8f0e1ad5327a3499e7f09157cb714302a856e8a4
	Issue introduced in 5.14 with commit 98659487b845c05b6bed85d881713545db674c7c and fixed in 6.1.29 with commit 16e0e6fb4511c004a5a0987d5bd75d9bcfb2b175
	Issue introduced in 5.14 with commit 98659487b845c05b6bed85d881713545db674c7c and fixed in 6.2.16 with commit 8eca32b5b92a0be956a8934d7eddf4f70c107927
	Issue introduced in 5.14 with commit 98659487b845c05b6bed85d881713545db674c7c and fixed in 6.3.3 with commit 19fe79ae816a7e3400df1eb4d27530bf9b8ae258
	Issue introduced in 5.14 with commit 98659487b845c05b6bed85d881713545db674c7c and fixed in 6.4 with commit a465353b9250802f87b97123e33a17f51277f0b1

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-2023-53837
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/msm/msm_drv.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/8f0e1ad5327a3499e7f09157cb714302a856e8a4
	https://git.kernel.org/stable/c/16e0e6fb4511c004a5a0987d5bd75d9bcfb2b175
	https://git.kernel.org/stable/c/8eca32b5b92a0be956a8934d7eddf4f70c107927
	https://git.kernel.org/stable/c/19fe79ae816a7e3400df1eb4d27530bf9b8ae258
	https://git.kernel.org/stable/c/a465353b9250802f87b97123e33a17f51277f0b1