Bug 2464446 (CVE-2026-43047)

Summary:	CVE-2026-43047 kernel: HID: multitouch: Check to ensure report responses match the request
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
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Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's Human Interface Device (HID) multitouch subsystem. A malicious or improperly configured HID device can respond to a feature request with an incorrect report ID. This confusion in the HID core can lead to out-of-bounds writes, potentially allowing a local attacker to achieve arbitrary code execution or cause a denial of service.	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 2026-05-01 15:07:16 UTC

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

HID: multitouch: Check to ensure report responses match the request

It is possible for a malicious (or clumsy) device to respond to a
specific report's feature request using a completely different report
ID.  This can cause confusion in the HID core resulting in nasty
side-effects such as OOB writes.

Add a check to ensure that the report ID in the response, matches the
one that was requested.  If it doesn't, omit reporting the raw event and
return early.

Comment 1 Keith Grant 2026-05-01 18:27:33 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050105-CVE-2026-43047-13ab@gregkh/T