linux-cve-announce - CVE-2025-39772: drm/hisilicon/hibmc: fix the hibmc loaded failed bug

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Message-ID: <2025091146-CVE-2025-39772-ddb9@gregkh>
Date: Thu, 11 Sep 2025 18:56:51 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-39772: drm/hisilicon/hibmc: fix the hibmc loaded failed bug

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

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

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

drm/hisilicon/hibmc: fix the hibmc loaded failed bug

When hibmc loaded failed, the driver use hibmc_unload to free the
resource, but the mutexes in mode.config are not init, which will
access an NULL pointer. Just change goto statement to return, because
hibnc_hw_init() doesn't need to free anything.

The Linux kernel CVE team has assigned CVE-2025-39772 to this issue.


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

	Issue introduced in 4.14 with commit b3df5e65cc03696b0624a877d03a3ddf3ef43f52 and fixed in 5.15.190 with commit ddf1691f25345699296e642f0f59f2d464722fa3
	Issue introduced in 4.14 with commit b3df5e65cc03696b0624a877d03a3ddf3ef43f52 and fixed in 6.1.149 with commit c950e1be3a24d021475b56efdb49daa7fbba63a9
	Issue introduced in 4.14 with commit b3df5e65cc03696b0624a877d03a3ddf3ef43f52 and fixed in 6.6.103 with commit f93032e5d68f459601c701f6ab087b5feb3382e8
	Issue introduced in 4.14 with commit b3df5e65cc03696b0624a877d03a3ddf3ef43f52 and fixed in 6.12.44 with commit a4f1b9c57092c48bdc7958abd23403ccaed437b2
	Issue introduced in 4.14 with commit b3df5e65cc03696b0624a877d03a3ddf3ef43f52 and fixed in 6.16.4 with commit d3e774266c28aefab3e9db334fdf568f936cae04
	Issue introduced in 4.14 with commit b3df5e65cc03696b0624a877d03a3ddf3ef43f52 and fixed in 6.17-rc3 with commit 93a08f856fcc5aaeeecad01f71bef3088588216a

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-2025-39772
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/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.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/ddf1691f25345699296e642f0f59f2d464722fa3
	https://git.kernel.org/stable/c/c950e1be3a24d021475b56efdb49daa7fbba63a9
	https://git.kernel.org/stable/c/f93032e5d68f459601c701f6ab087b5feb3382e8
	https://git.kernel.org/stable/c/a4f1b9c57092c48bdc7958abd23403ccaed437b2
	https://git.kernel.org/stable/c/d3e774266c28aefab3e9db334fdf568f936cae04
	https://git.kernel.org/stable/c/93a08f856fcc5aaeeecad01f71bef3088588216a