linux-cve-announce - CVE-2025-68344: ALSA: wavefront: Fix integer overflow in sample size validation

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Message-ID: <2025122449-CVE-2025-68344-3af5@gregkh>
Date: Wed, 24 Dec 2025 11:34:49 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68344: ALSA: wavefront: Fix integer overflow in sample size validation

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

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

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

ALSA: wavefront: Fix integer overflow in sample size validation

The wavefront_send_sample() function has an integer overflow issue
when validating sample size. The header->size field is u32 but gets
cast to int for comparison with dev->freemem

Fix by using unsigned comparison to avoid integer overflow.

The Linux kernel CVE team has assigned CVE-2025-68344 to this issue.


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

	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.12.63 with commit 5588b7c86effffa9bb55383a38800649d7b40778
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.17.13 with commit bca11de0a277b8baeb7d006f93b543c907b6e782
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.18.2 with commit 1823e08f76c68b9e1d26f6d5ef831b96f61a62a0
	Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.19-rc1 with commit 0c4a13ba88594fd4a27292853e736c6b4349823d

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-2025-68344
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/isa/wavefront/wavefront_synth.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/5588b7c86effffa9bb55383a38800649d7b40778
	https://git.kernel.org/stable/c/bca11de0a277b8baeb7d006f93b543c907b6e782
	https://git.kernel.org/stable/c/1823e08f76c68b9e1d26f6d5ef831b96f61a62a0
	https://git.kernel.org/stable/c/0c4a13ba88594fd4a27292853e736c6b4349823d