linux-cve-announce - CVE-2022-49306: usb: dwc3: host: Stop setting the ACPI companion

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Message-ID: <2025022635-CVE-2022-49306-a115@gregkh>
Date: Wed, 26 Feb 2025 03:09:40 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49306: usb: dwc3: host: Stop setting the ACPI companion

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

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

usb: dwc3: host: Stop setting the ACPI companion

It is no longer needed. The sysdev pointer is now used when
assigning the ACPI companions to the xHCI ports and USB
devices.

Assigning the ACPI companion here resulted in the
fwnode->secondary pointer to be replaced also for the parent
dwc3 device since the primary fwnode (the ACPI companion)
was shared. That was unintentional and it created potential
side effects like resource leaks.

The Linux kernel CVE team has assigned CVE-2022-49306 to this issue.


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

	Fixed in 5.17.15 with commit d7f35934f7ab67bfd9adabc84207e59da9c19108
	Fixed in 5.18.4 with commit 9c185fde906a48368bd2d2a8c17d4b6fb3d670af
	Fixed in 5.19 with commit 7fd069d65da2e20b1caec3b7bcf9dfbe28c04bb2

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-2022-49306
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/usb/dwc3/host.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/d7f35934f7ab67bfd9adabc84207e59da9c19108
	https://git.kernel.org/stable/c/9c185fde906a48368bd2d2a8c17d4b6fb3d670af
	https://git.kernel.org/stable/c/7fd069d65da2e20b1caec3b7bcf9dfbe28c04bb2