linux-cve-announce - CVE-2025-71185: dmaengine: ti: dma-crossbar: fix device leak on am335x route allocation

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Message-ID: <2026013117-CVE-2025-71185-231c@gregkh>
Date: Sat, 31 Jan 2026 12:44:18 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-71185: dmaengine: ti: dma-crossbar: fix device leak on am335x route allocation

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

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

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

dmaengine: ti: dma-crossbar: fix device leak on am335x route allocation

Make sure to drop the reference taken when looking up the crossbar
platform device during am335x route allocation.

The Linux kernel CVE team has assigned CVE-2025-71185 to this issue.


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

	Issue introduced in 4.4 with commit 42dbdcc6bf965997c088caff2a8be7f9bf44f701 and fixed in 6.6.122 with commit 6fdf168f57e331e148a1177a9b590a845c21b315
	Issue introduced in 4.4 with commit 42dbdcc6bf965997c088caff2a8be7f9bf44f701 and fixed in 6.12.67 with commit f810132e825588fbad3cba940458c58bb7ec4d84
	Issue introduced in 4.4 with commit 42dbdcc6bf965997c088caff2a8be7f9bf44f701 and fixed in 6.18.7 with commit 30352277d8e09c972436f883a5efd1f1b763ac14
	Issue introduced in 4.4 with commit 42dbdcc6bf965997c088caff2a8be7f9bf44f701 and fixed in 6.19-rc6 with commit 4fc17b1c6d2e04ad13fd6c21cfbac68043ec03f9

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-2025-71185
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/dma/ti/dma-crossbar.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/6fdf168f57e331e148a1177a9b590a845c21b315
	https://git.kernel.org/stable/c/f810132e825588fbad3cba940458c58bb7ec4d84
	https://git.kernel.org/stable/c/30352277d8e09c972436f883a5efd1f1b763ac14
	https://git.kernel.org/stable/c/4fc17b1c6d2e04ad13fd6c21cfbac68043ec03f9