Bug 2540448 (CVE-2026-97494)

Summary:	CVE-2026-97494 kernel: drm/amdgpu: validate and share PSP fw_pri_buf copies via psp_copy_fw
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 AMD GPU driver. The driver fails to validate the size of firmware images before copying them into the Platform Security Processor (PSP) private buffer. A local user could exploit this vulnerability by loading an oversized or malformed firmware image, triggering a buffer overflow. This issue can cause a Denial of Service (DoS) via a system crash or potentially lead to memory corruption.	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 2026-09-24 16:52:05 UTC

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

drm/amdgpu: validate and share PSP fw_pri_buf copies via psp_copy_fw

Change psp_copy_fw from void to int: return -ENODEV when drm_dev_enter
fails, and -EINVAL when the image size is zero or larger than the
1 MiB PSP private buffer.

Replace open-coded memset/memcpy into fw_pri_buf with psp_copy_fw.

Comment 1 Mauro Matteo Cascella 2026-09-30 07:35:46 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97494.mbox