linux-cve-announce - CVE-2025-38316: wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set

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Message-ID: <2025071015-CVE-2025-38316-2087@gregkh>
Date: Thu, 10 Jul 2025 09:42:57 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38316: wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set_monitor()

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

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

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

wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set_monitor()

The function mt7996_set_monitor() dereferences phy before
the NULL sanity check.

Fix this to avoid NULL pointer dereference by moving the
dereference after the check.

The Linux kernel CVE team has assigned CVE-2025-38316 to this issue.


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

	Issue introduced in 6.14 with commit 69d54ce7491d046eaae05de7fb2493319a481991 and fixed in 6.15.3 with commit 83a422c8169eef95aef57f7ddc467bb126d9ae81
	Issue introduced in 6.14 with commit 69d54ce7491d046eaae05de7fb2493319a481991 and fixed in 6.16-rc1 with commit cb423ddad0f6e6f55b1700422ab777b25597cc83

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-2025-38316
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/net/wireless/mediatek/mt76/mt7996/main.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/83a422c8169eef95aef57f7ddc467bb126d9ae81
	https://git.kernel.org/stable/c/cb423ddad0f6e6f55b1700422ab777b25597cc83