linux-cve-announce - CVE-2023-54133: nfp: clean mc addresses in application firmware when closing port

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Message-ID: <2025122420-CVE-2023-54133-dc22@gregkh>
Date: Wed, 24 Dec 2025 14:07:30 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54133: nfp: clean mc addresses in application firmware when closing port

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

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

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

nfp: clean mc addresses in application firmware when closing port

When moving devices from one namespace to another, mc addresses are
cleaned in software while not removed from application firmware. Thus
the mc addresses are remained and will cause resource leak.

Now use `__dev_mc_unsync` to clean mc addresses when closing port.

The Linux kernel CVE team has assigned CVE-2023-54133 to this issue.


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

	Issue introduced in 6.2 with commit e20aa071cd955aabc15be0ec1e914283592ddef4 and fixed in 6.4.5 with commit c427221733d49fd1e1b79b4a86746acf3ef660e7
	Issue introduced in 6.2 with commit e20aa071cd955aabc15be0ec1e914283592ddef4 and fixed in 6.5 with commit cc7eab25b1cf3f9594fe61142d3523ce4d14a788

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-2023-54133
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/net/ethernet/netronome/nfp/nfp_net_common.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/c427221733d49fd1e1b79b4a86746acf3ef660e7
	https://git.kernel.org/stable/c/cc7eab25b1cf3f9594fe61142d3523ce4d14a788