Bug 2541024 (CVE-2026-97578)

Summary:	CVE-2026-97578 kernel: media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer
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 Verisilicon Rockchip AV1 video decoder driver. A local user could exploit this vulnerability by submitting a specially crafted video stream with invalid tile parameters. This flaw can trigger a division-by-zero error or an out-of-bounds write to memory, leading to kernel instability or 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 2026-09-25 10:44:19 UTC

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

media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer

rockchip_vpu981_av1_dec_set_tile_info() divides context_update_tile_id by
tile_info->tile_cols and writes one descriptor per tile into the tile_info
DMA buffer, which holds AV1_MAX_TILES entries; tile_cols and tile_rows
come from the bitstream. Guard the division against a zero tile_cols by
initialising the context-update values to zero and computing them only
when tile_cols is non-zero, and stop the descriptor writes once the
tile_info buffer is full. The tile geometry written to the hardware
registers is left unmodified; the per-dimension and total tile bounds are
enforced by the control validation.

Comment 1 gkamathe 2026-09-29 05:39:53 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97578.mbox