Bug 2466989 (CVE-2026-43111)

Summary:	CVE-2026-43111 kernel: HID: roccat: fix use-after-free in roccat_report_event
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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 roccat Human Interface Device (HID) driver. This vulnerability, a use-after-free, arises from a synchronization issue where the `roccat_report_event()` function accesses a list of readers without adequate locking. A local attacker could exploit this to cause a system crash (denial of service) or potentially execute arbitrary code, compromising system integrity.	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 2026-05-06 10:02:04 UTC

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

HID: roccat: fix use-after-free in roccat_report_event

roccat_report_event() iterates over the device->readers list without
holding the readers_lock. This allows a concurrent roccat_release() to
remove and free a reader while it's still being accessed, leading to a
use-after-free.

Protect the readers list traversal with the readers_lock mutex.

Comment 1 Alexander B 2026-05-06 15:00:07 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050624-CVE-2026-43111-1e4c@gregkh/T