linux-cve-announce - CVE-2023-54320: platform/x86/amd: pmc: Fix memory leak in amd_pmc_stb_debugfs_open

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Message-ID: <2025123021-CVE-2023-54320-465d@gregkh>
Date: Tue, 30 Dec 2025 13:34:23 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-54320: platform/x86/amd: pmc: Fix memory leak in amd_pmc_stb_debugfs_open_v2()

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

platform/x86/amd: pmc: Fix memory leak in amd_pmc_stb_debugfs_open_v2()

Function amd_pmc_stb_debugfs_open_v2() may be called when the STB
debug mechanism enabled.

When amd_pmc_send_cmd() fails, the 'buf' needs to be released.

The Linux kernel CVE team has assigned CVE-2023-54320 to this issue.


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

	Fixed in 6.3.4 with commit d804adef7b23b22bb82e1b3dd113e9073cea9bc1
	Fixed in 6.4 with commit f6e7ac4c35a28aef0be93b32c533ae678ad0b9e7

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-2023-54320
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/amd/pmc.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/d804adef7b23b22bb82e1b3dd113e9073cea9bc1
	https://git.kernel.org/stable/c/f6e7ac4c35a28aef0be93b32c533ae678ad0b9e7