CVE-2026-74294: ASoC: meson: aiu: Validate written enum values

CVE-2026-74294: ASoC: meson: aiu: Validate written enum values

[Greg Kroah-Hartman]

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

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

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

ASoC: meson: aiu: Validate written enum values

The AIU HDMI and internal codec mux put callbacks use the written enum
value with snd_soc_enum_item_to_val() before checking whether the value is
valid for the enumeration.

Reject out-of-range values before converting the enum item, matching the
validation already done by the G12A HDMI and internal codec mux controls.

The Linux kernel CVE team has assigned CVE-2026-74294 to this issue.


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

	Issue introduced in 5.7 with commit b82b734c0e9a75e1b956214ac523a8eb590f51f3 and fixed in 7.1.5 with commit 0965892cc486ca554d72eeb62d85ccf8d0137a5a
	Issue introduced in 5.7 with commit b82b734c0e9a75e1b956214ac523a8eb590f51f3 and fixed in 7.2-rc1 with commit d65adf85477247be04ac86886f8edfaa047b5d4a

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-2026-74294
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:
	sound/soc/meson/aiu-acodec-ctrl.c
	sound/soc/meson/aiu-codec-ctrl.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/0965892cc486ca554d72eeb62d85ccf8d0137a5a
	https://git.kernel.org/stable/c/d65adf85477247be04ac86886f8edfaa047b5d4a