linux-cve-announce - CVE-2025-38296: ACPI: platform_profile: Avoid initializing on non-ACPI platforms

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Message-ID: <2025071012-CVE-2025-38296-1670@gregkh>
Date: Thu, 10 Jul 2025 09:42:37 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38296: ACPI: platform_profile: Avoid initializing on non-ACPI platforms

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

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

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

ACPI: platform_profile: Avoid initializing on non-ACPI platforms

The platform profile driver is loaded even on platforms that do not have
ACPI enabled. The initialization of the sysfs entries was recently moved
from platform_profile_register() to the module init call, and those
entries need acpi_kobj to be initialized which is not the case when ACPI
is disabled.

This results in the following warning:

 WARNING: CPU: 5 PID: 1 at fs/sysfs/group.c:131 internal_create_group+0xa22/0xdd8
 Modules linked in:
 CPU: 5 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W           6.15.0-rc7-dirty #6 PREEMPT
 Tainted: [W]=WARN
 Hardware name: riscv-virtio,qemu (DT)
 epc : internal_create_group+0xa22/0xdd8
  ra : internal_create_group+0xa22/0xdd8

 Call Trace:

 internal_create_group+0xa22/0xdd8
 sysfs_create_group+0x22/0x2e
 platform_profile_init+0x74/0xb2
 do_one_initcall+0x198/0xa9e
 kernel_init_freeable+0x6d8/0x780
 kernel_init+0x28/0x24c
 ret_from_fork+0xe/0x18

Fix this by checking if ACPI is enabled before trying to create sysfs
entries.

[ rjw: Subject and changelog edits ]

The Linux kernel CVE team has assigned CVE-2025-38296 to this issue.


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

	Issue introduced in 6.14 with commit 77be5cacb2c2d8c3ddd069f0b4e9408f553af1d8 and fixed in 6.15.3 with commit ccc3d68b92be89c30ba42ac62d2a141bd0c2b457
	Issue introduced in 6.14 with commit 77be5cacb2c2d8c3ddd069f0b4e9408f553af1d8 and fixed in 6.16-rc1 with commit dd133162c9cff5951a692fab9811fadf46a46457

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-2025-38296
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/acpi/platform_profile.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/ccc3d68b92be89c30ba42ac62d2a141bd0c2b457
	https://git.kernel.org/stable/c/dd133162c9cff5951a692fab9811fadf46a46457