Bug 2513482 (CVE-2026-68359)

Summary:	CVE-2026-68359 kernel: hwmon: (nzxt-smart2) Stop device IO before calling hid_hw_stop
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability-draft	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's hwmon (nzxt-smart2) component. A race condition exists when the `hid_hw_stop()` function is called without first stopping device input/output (IO). If a device probe operation fails after IO has been initiated, this race condition can lead to a use-after-free (UAF) vulnerability. This could allow a local attacker to potentially cause a system crash (denial of service) or achieve arbitrary code execution.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-10 12:39:50 UTC

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().

Comment 1 Mauro Matteo Cascella 2026-08-11 07:44:53 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081040-CVE-2026-68359-dfca@gregkh/T