Bug 2546358 (CVE-2026-98206)

Summary:	CVE-2026-98206 kernel: Input: cyttsp5 - clamp the HID report size before memcpy
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, 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 Cypress Generation 5 touchscreen (cyttsp5) driver. This vulnerability can lead to a Denial of Service (DoS) due to memory corruption because the driver does not properly validate the size of incoming data reports before copying them into a fixed-size buffer. A physically present attacker connecting a crafted or compromised touchscreen device could supply an oversized report length, triggering a buffer overflow that causes a system crash.	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 2026-10-06 09:05:06 UTC

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

Input: cyttsp5 - clamp the HID report size before memcpy

The size field comes from the device and is used as the memcpy()
length into response_buf, which is CY_MAX_INPUT bytes.