Bug 2482613 (CVE-2026-46203)

Summary:	CVE-2026-46203 kernel: spi: cadence-quadspi: fix unclocked access on unbind
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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, specifically within the `spi: cadence-quadspi` driver. This vulnerability occurs when the controller is not properly runtime resumed before being disabled during driver unbind, leading to unclocked register access. A local attacker could potentially exploit this to cause system instability or 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 2026-05-28 11:05:50 UTC

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

spi: cadence-quadspi: fix unclocked access on unbind

Make sure that the controller is runtime resumed before disabling it
during driver unbind to avoid an unclocked register access.

This issue was flagged by Sashiko when reviewing a controller
deregistration fix.

Comment 1 Keith Grant 2026-05-28 13:35:57 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052833-CVE-2026-46203-8cc7@gregkh/T