linux-cve-announce - CVE-2024-56696: ALSA: core: Fix possible NULL dereference caused by kunit

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Message-ID: <2024122836-CVE-2024-56696-2b90@gregkh>
Date: Sat, 28 Dec 2024 10:45:48 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56696: ALSA: core: Fix possible NULL dereference caused by kunit_kzalloc()

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

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

ALSA: core: Fix possible NULL dereference caused by kunit_kzalloc()

kunit_kzalloc() may return a NULL pointer, dereferencing it without
NULL check may lead to NULL dereference.
Add NULL checks for all the kunit_kzalloc() in sound_kunit.c

The Linux kernel CVE team has assigned CVE-2024-56696 to this issue.


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

	Issue introduced in 6.9 with commit 3e39acf56ededdebd1033349a16b704839b94b28 and fixed in 6.11.11 with commit f5486bf8abfe778b368d8fd1aa655dc01d0013ca
	Issue introduced in 6.9 with commit 3e39acf56ededdebd1033349a16b704839b94b28 and fixed in 6.12.2 with commit 8bfff486ecc79a72e9380e2d5e0ff234d5542d2f
	Issue introduced in 6.9 with commit 3e39acf56ededdebd1033349a16b704839b94b28 and fixed in 6.13-rc1 with commit 9ad467a2b2716d4ed12f003b041aa6c776a13ff5

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-2024-56696
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/core/sound_kunit.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/f5486bf8abfe778b368d8fd1aa655dc01d0013ca
	https://git.kernel.org/stable/c/8bfff486ecc79a72e9380e2d5e0ff234d5542d2f
	https://git.kernel.org/stable/c/9ad467a2b2716d4ed12f003b041aa6c776a13ff5