linux-cve-announce - CVE-2022-49141: net: dsa: felix: fix possible NULL pointer dereference

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Message-ID: <2025022607-CVE-2022-49141-eb9c@gregkh>
Date: Wed, 26 Feb 2025 02:55:46 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49141: net: dsa: felix: fix possible NULL pointer dereference

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

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

net: dsa: felix: fix possible NULL pointer dereference

As the possible failure of the allocation, kzalloc() may return NULL
pointer.
Therefore, it should be better to check the 'sgi' in order to prevent
the dereference of NULL pointer.

The Linux kernel CVE team has assigned CVE-2022-49141 to this issue.


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

	Issue introduced in 5.17 with commit 23ae3a7877718931474684ef4fbbaf1d1511ee84 and fixed in 5.17.3 with commit b7ff8b5e75d4e91ec8c62d621aac8dfb84c57aa9
	Issue introduced in 5.17 with commit 23ae3a7877718931474684ef4fbbaf1d1511ee84 and fixed in 5.18 with commit 866b7a278cdb51eb158cd8513bc7438fc857804a

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-2022-49141
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/dsa/ocelot/felix_vsc9959.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/b7ff8b5e75d4e91ec8c62d621aac8dfb84c57aa9
	https://git.kernel.org/stable/c/866b7a278cdb51eb158cd8513bc7438fc857804a