linux-cve-announce - CVE-2023-53203: wifi: mt76: mt7996: rely on mt76_connac2_mac_tx_rate

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Message-ID: <2025091509-CVE-2023-53203-4a9c@gregkh>
Date: Mon, 15 Sep 2025 16:21:37 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53203: wifi: mt76: mt7996: rely on mt76_connac2_mac_tx_rate_val

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

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

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

wifi: mt76: mt7996: rely on mt76_connac2_mac_tx_rate_val

In order to fix a possible NULL pointer dereference in
mt7996_mac_write_txwi() of vif pointer, export
mt76_connac2_mac_tx_rate_val utility routine and reuse it
in mt7996 driver.

The Linux kernel CVE team has assigned CVE-2023-53203 to this issue.


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

	Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 6.2.3 with commit 0765b5b4719f0435bb019370b317d2fb8138eb34
	Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 6.3 with commit 0b8e2d69467f78a7c9d87b452220e87012435e33

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-2023-53203
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/mediatek/mt76/mt76_connac.h
	drivers/net/wireless/mediatek/mt76/mt76_connac_mac.c
	drivers/net/wireless/mediatek/mt76/mt7996/mac.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/0765b5b4719f0435bb019370b317d2fb8138eb34
	https://git.kernel.org/stable/c/0b8e2d69467f78a7c9d87b452220e87012435e33