Bug 2524490 (CVE-2026-80568)

Summary:	CVE-2026-80568 kernel: Input: synaptics-rmi4 - block s_input when F54 queue is busy
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 `synaptics-rmi4` input driver. Changing the diagnostic report type while a video stream (V4L2) is active can alter the expected report size. Since V4L2 buffers are allocated based on the initial size at stream start, a larger subsequent report could lead to a heap buffer overflow. This vulnerability could allow a local attacker to potentially cause a 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 2026-08-26 15:00:10 UTC

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

Input: synaptics-rmi4 - block s_input when F54 queue is busy

Changing the input (diagnostic report type) mid-stream changes the
report size. Since V4L2 buffers are allocated based on the size at
stream start, changing the input while streaming could lead to a
heap buffer overflow if the new size is larger than the allocated
buffers.

Prevent this by blocking VIDIOC_S_INPUT with -EBUSY if the V4L2 queue
is busy (streaming).

Comment 1 gkamathe 2026-08-27 12:30:33 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082612-CVE-2026-80568-d3e3@gregkh/T