linux-cve-announce - CVE-2025-71187: dmaengine: sh: rz-dmac: fix device leak on probe failure

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Message-ID: <2026013118-CVE-2025-71187-b0b2@gregkh>
Date: Sat, 31 Jan 2026 12:44:20 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-71187: dmaengine: sh: rz-dmac: fix device leak on probe failure

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

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

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

dmaengine: sh: rz-dmac: fix device leak on probe failure

Make sure to drop the reference taken when looking up the ICU device
during probe also on probe failures (e.g. probe deferral).

The Linux kernel CVE team has assigned CVE-2025-71187 to this issue.


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

	Issue introduced in 6.16 with commit 7de873201c44bff5b42f2e560098d463843b8a4c and fixed in 6.18.7 with commit 926d1666420c227eab50962a8622c1b8444720e8
	Issue introduced in 6.16 with commit 7de873201c44bff5b42f2e560098d463843b8a4c and fixed in 6.19-rc6 with commit 9fb490323997dcb6f749cd2660a17a39854600cd

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-2025-71187
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/sh/rz-dmac.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/926d1666420c227eab50962a8622c1b8444720e8
	https://git.kernel.org/stable/c/9fb490323997dcb6f749cd2660a17a39854600cd