Bug 2528796 (CVE-2026-80909)

Summary:	CVE-2026-80909 kernel: drm/amdgpu: Reject UVD message with invalid number of h265 refs
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 amdgpu driver. By sending a specially crafted Universal Video Decoder (UVD) message with an invalid number of H.265 references, a local attacker could trigger an integer overflow. This overflow could lead to a denial of service by causing a system crash or instability.	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 2026-09-04 17:35:32 UTC

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

drm/amdgpu: Reject UVD message with invalid number of h265 refs

Same change as for h264, avoids overflow later when calculating
min dpb size.

(cherry picked from commit a4b0720e4f1601f97f59a2be9c1b4b94fa6527d5)

Comment 1 Mauro Matteo Cascella 2026-09-07 08:10:37 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80909.mbox