linux-cve-announce - CVE-2022-49618: pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set

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Message-ID: <2025022614-CVE-2022-49618-6279@gregkh>
Date: Wed, 26 Feb 2025 03:23:01 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49618: pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux()

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

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

pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux()

pdesc could be null but still dereference pdesc->name and it will lead to
a null pointer access. So we move a null check before dereference.

The Linux kernel CVE team has assigned CVE-2022-49618 to this issue.


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

	Fixed in 5.10.132 with commit ef1e38532f4b2f0f3b460e938a2e7076c3bed5ee
	Fixed in 5.15.56 with commit 3cb392b64304a05bf647e2e44efacd9a1f3c3c6a
	Fixed in 5.18.13 with commit e162a24f1dd06c0dcae71f2565c9f3da2827b98e
	Fixed in 5.19 with commit 84a85d3fef2e75b1fe9fc2af6f5267122555a1ed

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-2022-49618
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/pinctrl/aspeed/pinctrl-aspeed.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/ef1e38532f4b2f0f3b460e938a2e7076c3bed5ee
	https://git.kernel.org/stable/c/3cb392b64304a05bf647e2e44efacd9a1f3c3c6a
	https://git.kernel.org/stable/c/e162a24f1dd06c0dcae71f2565c9f3da2827b98e
	https://git.kernel.org/stable/c/84a85d3fef2e75b1fe9fc2af6f5267122555a1ed