linux-cve-announce - CVE-2025-38133: iio: adc: ad4851: fix ad4858 chan pointer handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025070331-CVE-2025-38133-5976@gregkh>
Date: Thu,  3 Jul 2025 10:35:50 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38133: iio: adc: ad4851: fix ad4858 chan pointer handling

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

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

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

iio: adc: ad4851: fix ad4858 chan pointer handling

The pointer returned from ad4851_parse_channels_common() is incremented
internally as each channel is populated. In ad4858_parse_channels(),
the same pointer was further incremented while setting ext_scan_type
fields for each channel. This resulted in indio_dev->channels being set
to a pointer past the end of the allocated array, potentially causing
memory corruption or undefined behavior.

Fix this by iterating over the channels using an explicit index instead
of incrementing the pointer. This preserves the original base pointer
and ensures all channel metadata is set correctly.

The Linux kernel CVE team has assigned CVE-2025-38133 to this issue.

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

	Issue introduced in 6.15 with commit 6250803fe2ec92be32a4df1c3a39c4a460d5bd58 and fixed in 6.15.3 with commit 6c3b9e1167d072ce2d01cafec7866647cf8d3616
	Issue introduced in 6.15 with commit 6250803fe2ec92be32a4df1c3a39c4a460d5bd58 and fixed in 6.16-rc1 with commit 499a8cee812588905cc940837e69918c1649a19e

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-2025-38133
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/iio/adc/ad4851.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/6c3b9e1167d072ce2d01cafec7866647cf8d3616
	https://git.kernel.org/stable/c/499a8cee812588905cc940837e69918c1649a19e