linux-cve-announce - CVE-2022-49472: net: phy: micrel: Allow probing without .driver

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Message-ID: <2025022603-CVE-2022-49472-eeea@gregkh>
Date: Wed, 26 Feb 2025 03:12:26 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49472: net: phy: micrel: Allow probing without .driver_data

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

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

net: phy: micrel: Allow probing without .driver_data

Currently, if the .probe element is present in the phy_driver structure
and the .driver_data is not, a NULL pointer dereference happens.

Allow passing .probe without .driver_data by inserting NULL checks
for priv->type.

The Linux kernel CVE team has assigned CVE-2022-49472 to this issue.


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

	Fixed in 4.14.283 with commit 7dcb404662839a4ed1a9703658fee979eb894ca4
	Fixed in 4.19.247 with commit 91e720b32cba25fa58eaa4c88fe957009cffe9f3
	Fixed in 5.4.198 with commit 1e5fbfc2a6f384e3195446c14bbd3bc298eb88c2
	Fixed in 5.10.121 with commit abb5594ae2ba7b82cce85917cc6337ec5d774837
	Fixed in 5.15.46 with commit 660dfa033ccc9afb032015b6dc76e846bba42cfb
	Fixed in 5.17.14 with commit 143878e18001c5a61fcc7ae5c5240323753bb641
	Fixed in 5.18.3 with commit bd219273b4e004a3f853da72e111fc8f81357501
	Fixed in 5.19 with commit f2ef6f7539c68c6bd6c32323d8845ee102b7c450

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-2022-49472
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/phy/micrel.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/7dcb404662839a4ed1a9703658fee979eb894ca4
	https://git.kernel.org/stable/c/91e720b32cba25fa58eaa4c88fe957009cffe9f3
	https://git.kernel.org/stable/c/1e5fbfc2a6f384e3195446c14bbd3bc298eb88c2
	https://git.kernel.org/stable/c/abb5594ae2ba7b82cce85917cc6337ec5d774837
	https://git.kernel.org/stable/c/660dfa033ccc9afb032015b6dc76e846bba42cfb
	https://git.kernel.org/stable/c/143878e18001c5a61fcc7ae5c5240323753bb641
	https://git.kernel.org/stable/c/bd219273b4e004a3f853da72e111fc8f81357501
	https://git.kernel.org/stable/c/f2ef6f7539c68c6bd6c32323d8845ee102b7c450