linux-cve-announce - CVE-2023-53442: ice: Block switchdev mode when ADQ is active and vice versa

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Message-ID: <2025091859-CVE-2023-53442-8a1f@gregkh>
Date: Thu, 18 Sep 2025 18:04:33 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53442: ice: Block switchdev mode when ADQ is active and vice versa

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

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

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

ice: Block switchdev mode when ADQ is active and vice versa

ADQ and switchdev are not supported simultaneously. Enabling both at the
same time can result in nullptr dereference.

To prevent this, check if ADQ is active when changing devlink mode to
switchdev mode, and check if switchdev is active when enabling ADQ.

The Linux kernel CVE team has assigned CVE-2023-53442 to this issue.


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

	Issue introduced in 5.16 with commit fbc7b27af0f9fb181811424e29caf6825594a841 and fixed in 6.1.47 with commit 1c82d1b736ce85e77fd4da05eca6f1f4a52a2bc3
	Issue introduced in 5.16 with commit fbc7b27af0f9fb181811424e29caf6825594a841 and fixed in 6.4.12 with commit 24f0d69da35d812b3a1104918014a29627140cb1
	Issue introduced in 5.16 with commit fbc7b27af0f9fb181811424e29caf6825594a841 and fixed in 6.5 with commit 43d00e102d9ecbe2635d7e3f2e14d2e90183d6af

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-2023-53442
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/intel/ice/ice_eswitch.c
	drivers/net/ethernet/intel/ice/ice_main.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/1c82d1b736ce85e77fd4da05eca6f1f4a52a2bc3
	https://git.kernel.org/stable/c/24f0d69da35d812b3a1104918014a29627140cb1
	https://git.kernel.org/stable/c/43d00e102d9ecbe2635d7e3f2e14d2e90183d6af