linux-cve-announce - CVE-2023-53050: thunderbolt: Fix memory leak in margining

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Message-ID: <2025050206-CVE-2023-53050-6072@gregkh>
Date: Fri,  2 May 2025 17:55:15 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53050: thunderbolt: Fix memory leak in margining

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

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

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

thunderbolt: Fix memory leak in margining

Memory for the usb4->margining needs to be relased for the upstream port
of the router as well, even though the debugfs directory gets released
with the router device removal. Fix this.

The Linux kernel CVE team has assigned CVE-2023-53050 to this issue.


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

	Issue introduced in 6.1 with commit d0f1e0c2a6990922818d6616a48d3d92bb7ddac1 and fixed in 6.1.22 with commit f390095bbd131ec2dfb29792d9f6fd0f0656bfc0
	Issue introduced in 6.1 with commit d0f1e0c2a6990922818d6616a48d3d92bb7ddac1 and fixed in 6.2.9 with commit 0b357b360e671688f9bf38ff94300515b68bc247
	Issue introduced in 6.1 with commit d0f1e0c2a6990922818d6616a48d3d92bb7ddac1 and fixed in 6.3 with commit acec726473822bc6b585961f4ca2a11fa7f28341

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-2023-53050
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/thunderbolt/debugfs.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/f390095bbd131ec2dfb29792d9f6fd0f0656bfc0
	https://git.kernel.org/stable/c/0b357b360e671688f9bf38ff94300515b68bc247
	https://git.kernel.org/stable/c/acec726473822bc6b585961f4ca2a11fa7f28341