CVE-2026-68359: hwmon: (nzxt-smart2) Stop device IO before calling hid_hw_stop

From: Greg Kroah-Hartman <[email protected]>

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

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

hwmon: (nzxt-smart2) Stop device IO before calling hid_hw_stop

Calling hid_hw_stop() does not stop the device IO.
This results in a race condition between hid_input_report() and the point
immediately following the execution of hid_device_io_start() within
the driver probe function. If the probe operation fails after "io start"
has been initiated, this race condition will result in a UAF vulnerability.

Fix the problem by calling hid_device_io_stop() before calling
hid_hw_stop().

The Linux kernel CVE team has assigned CVE-2026-68359 to this issue.


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

	Issue introduced in 5.17 with commit 53e68c20aeb1e23419bed811aa3a309ceda200f9 and fixed in 6.6.148 with commit 185c0880397aee9def0af5a59ea65f22f37ad658
	Issue introduced in 5.17 with commit 53e68c20aeb1e23419bed811aa3a309ceda200f9 and fixed in 6.12.101 with commit a2a15de020597efbff84b4281dd472e5860b7e3e
	Issue introduced in 5.17 with commit 53e68c20aeb1e23419bed811aa3a309ceda200f9 and fixed in 6.18.42 with commit 205cff797a94757ec88ba299c8e2bf2e1e3f4bbf
	Issue introduced in 5.17 with commit 53e68c20aeb1e23419bed811aa3a309ceda200f9 and fixed in 7.1.6 with commit 18d7c523891004226bccdba39dd681eca22ceb8a
	Issue introduced in 5.17 with commit 53e68c20aeb1e23419bed811aa3a309ceda200f9 and fixed in 7.2-rc5 with commit 59d104b54b0b42e30fd2a68d24ee5c49dcc54d1e

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-2026-68359
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/hwmon/nzxt-smart2.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/185c0880397aee9def0af5a59ea65f22f37ad658
	https://git.kernel.org/stable/c/a2a15de020597efbff84b4281dd472e5860b7e3e
	https://git.kernel.org/stable/c/205cff797a94757ec88ba299c8e2bf2e1e3f4bbf
	https://git.kernel.org/stable/c/18d7c523891004226bccdba39dd681eca22ceb8a
	https://git.kernel.org/stable/c/59d104b54b0b42e30fd2a68d24ee5c49dcc54d1e