linux-cve-announce - CVE-2025-37809: usb: typec: class: Fix NULL pointer access

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Message-ID: <2025050816-CVE-2025-37809-7d55@gregkh>
Date: Thu,  8 May 2025 08:39:18 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37809: usb: typec: class: Fix NULL pointer access

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

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

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

usb: typec: class: Fix NULL pointer access

Concurrent calls to typec_partner_unlink_device can lead to a NULL pointer
dereference. This patch adds a mutex to protect USB device pointers and
prevent this issue. The same mutex protects both the device pointers and
the partner device registration.

The Linux kernel CVE team has assigned CVE-2025-37809 to this issue.


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

	Issue introduced in 6.7 with commit 59de2a56d127890cc610f3896d5fc31887c54ac2 and fixed in 6.12.26 with commit de7c24febd21413ea8f49f61b36338b676c02852
	Issue introduced in 6.7 with commit 59de2a56d127890cc610f3896d5fc31887c54ac2 and fixed in 6.14.5 with commit 1fdde62411fe65640e69bc55ea027d5b7b2f0093
	Issue introduced in 6.7 with commit 59de2a56d127890cc610f3896d5fc31887c54ac2 and fixed in 6.15-rc4 with commit ec27386de23a511008c53aa2f3434ad180a3ca9a

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-2025-37809
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/usb/typec/class.c
	drivers/usb/typec/class.h


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/de7c24febd21413ea8f49f61b36338b676c02852
	https://git.kernel.org/stable/c/1fdde62411fe65640e69bc55ea027d5b7b2f0093
	https://git.kernel.org/stable/c/ec27386de23a511008c53aa2f3434ad180a3ca9a