linux-cve-announce - CVE-2023-53806: drm/amd/display: populate subvp cmd info only for the top pipe

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: <2025120943-CVE-2023-53806-03cb@gregkh>
Date: Tue,  9 Dec 2025 09:02:27 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53806: drm/amd/display: populate subvp cmd info only for the top pipe

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

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

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

drm/amd/display: populate subvp cmd info only for the top pipe

[Why]
System restart observed while changing the display resolution
to 8k with extended mode. Sytem restart was caused by a page fault.

[How]
When the driver populates subvp info it did it for both the pipes using
vblank which caused an outof bounds array access causing the page fault.
added checks to allow the top pipe only to fix this issue.

The Linux kernel CVE team has assigned CVE-2023-53806 to this issue.


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

	Fixed in 6.1.30 with commit 92e6c79acad4b96efeff261d27bdbd8089a7dd24
	Fixed in 6.3.4 with commit 375d192eb1f1d9229a6d994da7ba31f3582b106b
	Fixed in 6.4 with commit 9bb10b7aaec3b6278f9cc410c17dcaa129bbbbf0

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-2023-53806
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/dc/dc_dmub_srv.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/92e6c79acad4b96efeff261d27bdbd8089a7dd24
	https://git.kernel.org/stable/c/375d192eb1f1d9229a6d994da7ba31f3582b106b
	https://git.kernel.org/stable/c/9bb10b7aaec3b6278f9cc410c17dcaa129bbbbf0