linux-cve-announce - CVE-2022-49484: mt76: mt7915: fix possible NULL pointer dereference in mt7915_mac_fill_rx

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Message-ID: <2025022605-CVE-2022-49484-4983@gregkh>
Date: Wed, 26 Feb 2025 03:12:38 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49484: mt76: mt7915: fix possible NULL pointer dereference in mt7915_mac_fill_rx_vector

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

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

mt76: mt7915: fix possible NULL pointer dereference in mt7915_mac_fill_rx_vector

Fix possible NULL pointer dereference in mt7915_mac_fill_rx_vector
routine if the chip does not support dbdc and the hw reports band_idx
set to 1.

The Linux kernel CVE team has assigned CVE-2022-49484 to this issue.


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

	Issue introduced in 5.12 with commit 78fc30a21cf1175e97567fa5153c0efc7d955a45 and fixed in 5.18.3 with commit 268e8ef187eb8780d021b0e4f5ffa92dee5c4983
	Issue introduced in 5.12 with commit 78fc30a21cf1175e97567fa5153c0efc7d955a45 and fixed in 5.19 with commit 62fdc974894eec80d678523458cf99bbdb887e22

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-2022-49484
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/mt7915/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/268e8ef187eb8780d021b0e4f5ffa92dee5c4983
	https://git.kernel.org/stable/c/62fdc974894eec80d678523458cf99bbdb887e22