linux-cve-announce - CVE-2022-49665: platform/x86: thinkpad_acpi: Fix a memory leak of EFCH MMIO resource

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Message-ID: <2025022623-CVE-2022-49665-502b@gregkh>
Date: Wed, 26 Feb 2025 03:23:48 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49665: platform/x86: thinkpad_acpi: Fix a memory leak of EFCH MMIO resource

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

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

platform/x86: thinkpad_acpi: Fix a memory leak of EFCH MMIO resource

Unlike release_mem_region(), a call to release_resource() does not
free the resource, so it has to be freed explicitly to avoid a memory
leak.

The Linux kernel CVE team has assigned CVE-2022-49665 to this issue.


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

	Issue introduced in 5.18 with commit 455cd867b85b53fd3602345f9b8a8facc551adc9 and fixed in 5.18.10 with commit 3884bf75fa044c73e843d95dd71a424e80ebb095
	Issue introduced in 5.18 with commit 455cd867b85b53fd3602345f9b8a8facc551adc9 and fixed in 5.19 with commit d2f33f0c3ad7b0d5262d9b986f1353265fad7a08

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-2022-49665
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/platform/x86/thinkpad_acpi.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/3884bf75fa044c73e843d95dd71a424e80ebb095
	https://git.kernel.org/stable/c/d2f33f0c3ad7b0d5262d9b986f1353265fad7a08