linux-cve-announce - CVE-2022-50526: drm/msm/dp: fix memory corruption with too many bridges

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: <2025100706-CVE-2022-50526-abd9@gregkh>
Date: Tue,  7 Oct 2025 17:19:13 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50526: drm/msm/dp: fix memory corruption with too many bridges

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

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

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

drm/msm/dp: fix memory corruption with too many bridges

Add the missing sanity check on the bridge counter to avoid corrupting
data beyond the fixed-sized bridge array in case there are ever more
than eight bridges.

Patchwork: https://patchwork.freedesktop.org/patch/502664/

The Linux kernel CVE team has assigned CVE-2022-50526 to this issue.


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

	Issue introduced in 5.17 with commit 8a3b4c17f863cde8e8743edd8faffe916c49b960 and fixed in 6.0.7 with commit b312fcab461bd9484c61409007a6fe059f9c2074
	Issue introduced in 5.17 with commit 8a3b4c17f863cde8e8743edd8faffe916c49b960 and fixed in 6.1 with commit 74466e46e7543c7f74f1502181e9ba93f7521374

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-2022-50526
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/dp/dp_display.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/b312fcab461bd9484c61409007a6fe059f9c2074
	https://git.kernel.org/stable/c/74466e46e7543c7f74f1502181e9ba93f7521374