linux-cve-announce - CVE-2025-21798: firewire: test: Fix potential null dereference in firewire kunit test

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Message-ID: <2025022751-CVE-2025-21798-5fcb@gregkh>
Date: Thu, 27 Feb 2025 11:59:52 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21798: firewire: test: Fix potential null dereference in firewire kunit test

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

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

firewire: test: Fix potential null dereference in firewire kunit test

kunit_kzalloc() may return a NULL pointer, dereferencing it without
NULL check may lead to NULL dereference.
Add a NULL check for test_state.

The Linux kernel CVE team has assigned CVE-2025-21798 to this issue.


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

	Issue introduced in 6.8 with commit 1c8506d62624fbc57db75414a387f365da8422e9 and fixed in 6.12.13 with commit c6896bf4c611c3dd126f3e03685f2360a18b3d6f
	Issue introduced in 6.8 with commit 1c8506d62624fbc57db75414a387f365da8422e9 and fixed in 6.13.2 with commit 70fcb25472d90dd3b87cbee74b9eb68670b0c7b8
	Issue introduced in 6.8 with commit 1c8506d62624fbc57db75414a387f365da8422e9 and fixed in 6.14-rc1 with commit 352fafe97784e81a10a7c74bd508f71a19b53c2a

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-2025-21798
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/firewire/device-attribute-test.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/c6896bf4c611c3dd126f3e03685f2360a18b3d6f
	https://git.kernel.org/stable/c/70fcb25472d90dd3b87cbee74b9eb68670b0c7b8
	https://git.kernel.org/stable/c/352fafe97784e81a10a7c74bd508f71a19b53c2a