Bug 2507235 (CVE-2026-64516)

Summary:	CVE-2026-64516 kernel: drm/amdgpu/vce1: Fix VCE 1 firmware size and offsets
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:	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 `drm/amdgpu/vce1` component. The vulnerability arises from incorrect calculations of the VCE 1 firmware size and offsets, which could lead to an out-of-bounds access. This issue could potentially allow a local attacker to cause system instability or a denial of service (DoS) by manipulating the firmware handling.	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 2026-07-25 10:12:05 UTC

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

drm/amdgpu/vce1: Fix VCE 1 firmware size and offsets

The VCPU BO contains the actual FW at an offset, but
it was not calculated into the VCPU BO size.
Subtract this from the FW size to make sure there is
no out of bounds access.

Make sure the stack and data offsets are aligned to
the 32K TLB size.

Check that the FW microcode actually fits in the
space that is reserved for it.

(cherry picked from commit c16fe59f622a080fc457a57b3e8f14c780699449)

Comment 1 TEJ RATHI 2026-07-29 07:29:36 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072537-CVE-2026-64516-a645@gregkh/T