linux-cve-announce - CVE-2025-71163: dmaengine: idxd: fix device leaks on compat bind and unbind

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Message-ID: <2026012532-CVE-2025-71163-03ce@gregkh>
Date: Sun, 25 Jan 2026 15:36:31 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-71163: dmaengine: idxd: fix device leaks on compat bind and unbind

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

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

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

dmaengine: idxd: fix device leaks on compat bind and unbind

Make sure to drop the reference taken when looking up the idxd device as
part of the compat bind and unbind sysfs interface.

The Linux kernel CVE team has assigned CVE-2025-71163 to this issue.


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

	Issue introduced in 5.15 with commit 6e7f3ee97bbe2c7d7a53b7dbd7a08a579e03c8c9 and fixed in 6.12.67 with commit 0c97ff108f825a70c3bb29d65ddf0a013d231bb9
	Issue introduced in 5.15 with commit 6e7f3ee97bbe2c7d7a53b7dbd7a08a579e03c8c9 and fixed in 6.18.7 with commit a7226fd61def74b60dd8e47ec84cabafc39d575b
	Issue introduced in 5.15 with commit 6e7f3ee97bbe2c7d7a53b7dbd7a08a579e03c8c9 and fixed in 6.19-rc6 with commit 799900f01792cf8b525a44764f065f83fcafd468

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-2025-71163
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/idxd/compat.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/0c97ff108f825a70c3bb29d65ddf0a013d231bb9
	https://git.kernel.org/stable/c/a7226fd61def74b60dd8e47ec84cabafc39d575b
	https://git.kernel.org/stable/c/799900f01792cf8b525a44764f065f83fcafd468