linux-cve-announce - CVE-2022-49646: wifi: mac80211: fix queue selection for mesh/OCB interfaces

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Message-ID: <2025022619-CVE-2022-49646-248b@gregkh>
Date: Wed, 26 Feb 2025 03:23:29 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49646: wifi: mac80211: fix queue selection for mesh/OCB interfaces

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

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

wifi: mac80211: fix queue selection for mesh/OCB interfaces

When using iTXQ, the code assumes that there is only one vif queue for
broadcast packets, using the BE queue. Allowing non-BE queue marking
violates that assumption and txq->ac == skb_queue_mapping is no longer
guaranteed. This can cause issues with queue handling in the driver and
also causes issues with the recent ATF change, resulting in an AQL
underflow warning.

The Linux kernel CVE team has assigned CVE-2022-49646 to this issue.


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

	Fixed in 5.4.207 with commit 444be5a02b77f3b7a8ac9c1a0b074fbb3bd89cd0
	Fixed in 5.10.132 with commit e013ea2a51a94b903b396a8dff531a07d470335d
	Fixed in 5.15.56 with commit 5a9df31017999197b6e60535940f2f2fe1bd3b0d
	Fixed in 5.18.13 with commit 41ecab279a70dced9005f4d55fa0fcde8938603f
	Fixed in 5.19 with commit 50e2ab39291947b6c6c7025cf01707c270fcde59

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-2022-49646
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:
	net/mac80211/wme.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/444be5a02b77f3b7a8ac9c1a0b074fbb3bd89cd0
	https://git.kernel.org/stable/c/e013ea2a51a94b903b396a8dff531a07d470335d
	https://git.kernel.org/stable/c/5a9df31017999197b6e60535940f2f2fe1bd3b0d
	https://git.kernel.org/stable/c/41ecab279a70dced9005f4d55fa0fcde8938603f
	https://git.kernel.org/stable/c/50e2ab39291947b6c6c7025cf01707c270fcde59