linux-cve-announce - CVE-2023-54029: wifi: iwlwifi: fix iwl_mvm_max_amsdu

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Message-ID: <2025122436-CVE-2023-54029-0d67@gregkh>
Date: Wed, 24 Dec 2025 11:57:13 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54029: wifi: iwlwifi: fix iwl_mvm_max_amsdu_size() for MLO

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

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

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

wifi: iwlwifi: fix iwl_mvm_max_amsdu_size() for MLO

For MLO, we cannot use vif->bss_conf.chandef.chan->band, since
that will lead to a NULL-ptr dereference as bss_conf isn't used.
However, in case of real MLO, we also need to take both LMACs
into account if they exist, since the station might be active
on both LMACs at the same time.

The Linux kernel CVE team has assigned CVE-2023-54029 to this issue.


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

	Fixed in 6.1.30 with commit 63e2d06adf6b0842132ba89efdf8fada5f7ff1ac
	Fixed in 6.3.4 with commit 4489aa868bc6343afdaf5ef324af5b1f64962b25
	Fixed in 6.4 with commit b2bc600cced23762d4e97db8989b18772145604f

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-2023-54029
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/wireless/intel/iwlwifi/mvm/tx.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/63e2d06adf6b0842132ba89efdf8fada5f7ff1ac
	https://git.kernel.org/stable/c/4489aa868bc6343afdaf5ef324af5b1f64962b25
	https://git.kernel.org/stable/c/b2bc600cced23762d4e97db8989b18772145604f