linux-cve-announce - CVE-2023-53864: drm/mxsfb: Disable overlay plane in mxsfb_plane_overlay_atomic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025120906-CVE-2023-53864-8bca@gregkh>
Date: Tue,  9 Dec 2025 10:31:48 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53864: drm/mxsfb: Disable overlay plane in mxsfb_plane_overlay_atomic_disable()

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

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

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

drm/mxsfb: Disable overlay plane in mxsfb_plane_overlay_atomic_disable()

When disabling overlay plane in mxsfb_plane_overlay_atomic_update(),
overlay plane's framebuffer pointer is NULL.  So, dereferencing it would
cause a kernel Oops(NULL pointer dereferencing).  Fix the issue by
disabling overlay plane in mxsfb_plane_overlay_atomic_disable() instead.

The Linux kernel CVE team has assigned CVE-2023-53864 to this issue.


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

	Issue introduced in 5.19 with commit cb285a5348e768dbc8edfe28cc2be5ec0c7e1a33 and fixed in 6.1.54 with commit 8bf2d4ca521d3acb57fc1607386e749b3cc92aaf
	Issue introduced in 5.19 with commit cb285a5348e768dbc8edfe28cc2be5ec0c7e1a33 and fixed in 6.5.4 with commit 0f98de0a11d29821d9448114178ddc1b1fe32a18
	Issue introduced in 5.19 with commit cb285a5348e768dbc8edfe28cc2be5ec0c7e1a33 and fixed in 6.6 with commit aa656d48e871a1b062e1bbf9474d8b831c35074c

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-2023-53864
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/mxsfb/mxsfb_kms.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/8bf2d4ca521d3acb57fc1607386e749b3cc92aaf
	https://git.kernel.org/stable/c/0f98de0a11d29821d9448114178ddc1b1fe32a18
	https://git.kernel.org/stable/c/aa656d48e871a1b062e1bbf9474d8b831c35074c