linux-cve-announce - CVE-2025-38340: firmware: cs_dsp: Fix OOB memory read access in KUnit test

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Message-ID: <2025071034-CVE-2025-38340-bd10@gregkh>
Date: Thu, 10 Jul 2025 10:15:48 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38340: firmware: cs_dsp: Fix OOB memory read access in KUnit test

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

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

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

firmware: cs_dsp: Fix OOB memory read access in KUnit test

KASAN reported out of bounds access - cs_dsp_mock_bin_add_name_or_info(),
because the source string length was rounded up to the allocation size.

The Linux kernel CVE team has assigned CVE-2025-38340 to this issue.


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

	Fixed in 6.15.4 with commit 8f4cc454a0bb45b800bc7817c09c8f72e31901f3
	Fixed in 6.16-rc1 with commit fe6446215bfad11cf3b446f38b28dc7708973c25

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-2025-38340
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/firmware/cirrus/test/cs_dsp_mock_bin.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/8f4cc454a0bb45b800bc7817c09c8f72e31901f3
	https://git.kernel.org/stable/c/fe6446215bfad11cf3b446f38b28dc7708973c25