linux-cve-announce - CVE-2023-54083: phy: tegra: xusb: Clear the driver reference in usb-phy dev

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Message-ID: <2025122404-CVE-2023-54083-fc0e@gregkh>
Date: Wed, 24 Dec 2025 14:06:40 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54083: phy: tegra: xusb: Clear the driver reference in usb-phy dev

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

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

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

phy: tegra: xusb: Clear the driver reference in usb-phy dev

For the dual-role port, it will assign the phy dev to usb-phy dev and
use the port dev driver as the dev driver of usb-phy.

When we try to destroy the port dev, it will destroy its dev driver
as well. But we did not remove the reference from usb-phy dev. This
might cause the use-after-free issue in KASAN.

The Linux kernel CVE team has assigned CVE-2023-54083 to this issue.


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

	Issue introduced in 5.7 with commit e8f7d2f409a15c519d5a6085777d85c1c4bab73a and fixed in 5.10.188 with commit b6a107c52073496d2e5d2837915f59fb3103832f
	Issue introduced in 5.7 with commit e8f7d2f409a15c519d5a6085777d85c1c4bab73a and fixed in 5.15.121 with commit b84998a407a882991916b1a61d987c400d8a0ce6
	Issue introduced in 5.7 with commit e8f7d2f409a15c519d5a6085777d85c1c4bab73a and fixed in 6.1.39 with commit 238edc04ddb9d272b38f5419bcd419ad3b92b91b
	Issue introduced in 5.7 with commit e8f7d2f409a15c519d5a6085777d85c1c4bab73a and fixed in 6.4.4 with commit 82187460347ad58fd6b06d2883da73c3f2df9631
	Issue introduced in 5.7 with commit e8f7d2f409a15c519d5a6085777d85c1c4bab73a and fixed in 6.5 with commit c0c2fcb1325d0d4f3b322b5ee49385f8eca2560d

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-2023-54083
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/phy/tegra/xusb.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/b6a107c52073496d2e5d2837915f59fb3103832f
	https://git.kernel.org/stable/c/b84998a407a882991916b1a61d987c400d8a0ce6
	https://git.kernel.org/stable/c/238edc04ddb9d272b38f5419bcd419ad3b92b91b
	https://git.kernel.org/stable/c/82187460347ad58fd6b06d2883da73c3f2df9631
	https://git.kernel.org/stable/c/c0c2fcb1325d0d4f3b322b5ee49385f8eca2560d