Bug 2559740 (CVE-2026-98970)

Summary:	CVE-2026-98970 kernel: drm/vc4: Free the BO cache size list on teardown
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:	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 VideoCore IV (vc4) graphics driver. When the driver is unbound during device teardown, cached buffer objects are purged but the associated size list is not released. A local user capable of triggering repeated unbind operations could exploit this memory leak to exhaust system resources, leading to a Denial of Service (DoS).	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 2026-10-23 13:26:57 UTC

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

drm/vc4: Free the BO cache size list on teardown

vc4_bo_cache_destroy() purges the cached BOs but never frees the size
list, leaking it on every unbind.