linux-cve-announce - CVE-2024-56557: iio: adc: ad7923: Fix buffer overflow for tx_buf and ring

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Message-ID: <2024122711-CVE-2024-56557-7440@gregkh>
Date: Fri, 27 Dec 2024 15:23:08 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56557: iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer

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

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

iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer

The AD7923 was updated to support devices with 8 channels, but the size
of tx_buf and ring_xfer was not increased accordingly, leading to a
potential buffer overflow in ad7923_update_scan_mode().

The Linux kernel CVE team has assigned CVE-2024-56557 to this issue.


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

	Issue introduced in 5.6 with commit 851644a60d200c9a294de5a5594004bcf13d34c7 and fixed in 6.1.120 with commit 00663d3e000c31d0d49ef86a809f5c107c2d09cd
	Issue introduced in 5.6 with commit 851644a60d200c9a294de5a5594004bcf13d34c7 and fixed in 6.6.64 with commit e5cac32721997cb8bcb208a29f4598b3faf46338
	Issue introduced in 5.6 with commit 851644a60d200c9a294de5a5594004bcf13d34c7 and fixed in 6.12.4 with commit 218ecc35949129171ca39bcc0d407c8dc4cd0bbc
	Issue introduced in 5.6 with commit 851644a60d200c9a294de5a5594004bcf13d34c7 and fixed in 6.13-rc1 with commit 3a4187ec454e19903fd15f6e1825a4b84e59a4cd

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-2024-56557
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/ad7923.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/00663d3e000c31d0d49ef86a809f5c107c2d09cd
	https://git.kernel.org/stable/c/e5cac32721997cb8bcb208a29f4598b3faf46338
	https://git.kernel.org/stable/c/218ecc35949129171ca39bcc0d407c8dc4cd0bbc
	https://git.kernel.org/stable/c/3a4187ec454e19903fd15f6e1825a4b84e59a4cd