linux-cve-announce - CVE-2023-53787: regulator: da9063: fix null pointer deref with partial DT config

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Message-ID: <2025120940-CVE-2023-53787-2074@gregkh>
Date: Tue,  9 Dec 2025 09:02:08 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53787: regulator: da9063: fix null pointer deref with partial DT config

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

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

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

regulator: da9063: fix null pointer deref with partial DT config

When some of the da9063 regulators do not have corresponding DT nodes
a null pointer dereference occurs on boot because such regulators have
no init_data causing the pointers calculated in
da9063_check_xvp_constraints() to be invalid.

Do not dereference them in this case.

The Linux kernel CVE team has assigned CVE-2023-53787 to this issue.


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

	Issue introduced in 6.4 with commit b8717a80e6ee6500ae396d21aac2a00947bba993 and fixed in 6.4.7 with commit 04a025b17d83d07924e5e32508c72536ab8f42d9
	Issue introduced in 6.4 with commit b8717a80e6ee6500ae396d21aac2a00947bba993 and fixed in 6.5 with commit 98e2dd5f7a8be5cb2501a897e96910393a49f0ff

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-2023-53787
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/regulator/da9063-regulator.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/04a025b17d83d07924e5e32508c72536ab8f42d9
	https://git.kernel.org/stable/c/98e2dd5f7a8be5cb2501a897e96910393a49f0ff