linux-cve-announce - CVE-2023-53012: thermal: core: call put_device() only after device

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Message-ID: <2025032715-CVE-2023-53012-597c@gregkh>
Date: Thu, 27 Mar 2025 17:43:59 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2023-53012: thermal: core: call put_device() only after device_register() fails

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

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

thermal: core: call put_device() only after device_register() fails

put_device() shouldn't be called before a prior call to
device_register(). __thermal_cooling_device_register() doesn't follow
that properly and needs fixing. Also
thermal_cooling_device_destroy_sysfs() is getting called unnecessarily
on few error paths.

Fix all this by placing the calls at the right place.

Based on initial work done by Caleb Connolly.

The Linux kernel CVE team has assigned CVE-2023-53012 to this issue.


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

	Issue introduced in 5.15.86 with commit 5139cbc0c6e4bf2fcffc9a7ed4350bf6985bc561
	Issue introduced in 6.0.16 with commit c4c435d3637b5d0abaa6447c7366c3674364968a
	Issue introduced in 6.1.2 with commit e0d8b51bbe84d6a98c162e06344de2d773d9e722

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-2023-53012
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/thermal/thermal_core.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/a7d736cc3c6cb0d7498bbfb56515d414e35e9510
	https://git.kernel.org/stable/c/2846a7412f6246fd5171f51011bf76dfebcec0ee
	https://git.kernel.org/stable/c/6c54b7bc8a31ce0f7cc7f8deef05067df414f1d8