linux-cve-announce - CVE-2025-38098: drm/amd/display: Don't treat wb connector as physical in create_validate_stream_for

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Message-ID: <2025070305-CVE-2025-38098-2802@gregkh>
Date: Thu,  3 Jul 2025 10:14:06 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38098: drm/amd/display: Don't treat wb connector as physical in create_validate_stream_for_sink

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

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

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

drm/amd/display: Don't treat wb connector as physical in create_validate_stream_for_sink

Don't try to operate on a drm_wb_connector as an amdgpu_dm_connector.
While dereferencing aconnector->base will "work" it's wrong and
might lead to unknown bad things. Just... don't.

The Linux kernel CVE team has assigned CVE-2025-38098 to this issue.


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

	Fixed in 6.12.31 with commit b14e726d57f61085485f107a6203c50a09695abd
	Fixed in 6.14.9 with commit 18ca68f7c657721583a75cab01f0d0d2ec63a6c9
	Fixed in 6.15 with commit cbf4890c6f28fb1ad733e14613fbd33c2004bced

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-2025-38098
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/amd/display/amdgpu_dm/amdgpu_dm.c
	drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
	drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.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/b14e726d57f61085485f107a6203c50a09695abd
	https://git.kernel.org/stable/c/18ca68f7c657721583a75cab01f0d0d2ec63a6c9
	https://git.kernel.org/stable/c/cbf4890c6f28fb1ad733e14613fbd33c2004bced