linux-cve-announce - CVE-2025-71138: drm/msm/dpu: Add missing NULL pointer check for pingpong interface

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Message-ID: <2026011454-CVE-2025-71138-d052@gregkh>
Date: Wed, 14 Jan 2026 16:08:02 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-71138: drm/msm/dpu: Add missing NULL pointer check for pingpong interface

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

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

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

drm/msm/dpu: Add missing NULL pointer check for pingpong interface

It is checked almost always in dpu_encoder_phys_wb_setup_ctl(), but in a
single place the check is missing.
Also use convenient locals instead of phys_enc->* where available.

Patchwork: https://patchwork.freedesktop.org/patch/693860/

The Linux kernel CVE team has assigned CVE-2025-71138 to this issue.


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

	Issue introduced in 5.19 with commit d7d0e73f7de33a2b9998b607707a3e944ef3b86d and fixed in 6.6.120 with commit 678d1c86566dfbb247ba25482d37fddde6140cc9
	Issue introduced in 5.19 with commit d7d0e73f7de33a2b9998b607707a3e944ef3b86d and fixed in 6.12.64 with commit 471baae774a30a04cf066907b60eaf3732928cb7
	Issue introduced in 5.19 with commit d7d0e73f7de33a2b9998b607707a3e944ef3b86d and fixed in 6.18.4 with commit 35ea3282136a630a3fd92b76f5a3a02651145ef1
	Issue introduced in 5.19 with commit d7d0e73f7de33a2b9998b607707a3e944ef3b86d and fixed in 6.19-rc3 with commit 88733a0b64872357e5ecd82b7488121503cb9cc6

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-2025-71138
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/disp/dpu1/dpu_encoder_phys_wb.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/678d1c86566dfbb247ba25482d37fddde6140cc9
	https://git.kernel.org/stable/c/471baae774a30a04cf066907b60eaf3732928cb7
	https://git.kernel.org/stable/c/35ea3282136a630a3fd92b76f5a3a02651145ef1
	https://git.kernel.org/stable/c/88733a0b64872357e5ecd82b7488121503cb9cc6