Bug 2540532 (CVE-2026-97425)

Summary:	CVE-2026-97425 kernel: drm/amdgpu: fix buffer overflow during vBIOS update
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:
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Doc Text:	A flaw was found in the Linux kernel's AMD GPU (amdgpu) driver. The driver fails to enforce maximum size limits on the sysfs interface used for updating the video Basic Input/Output System (vBIOS). A local user with write access to the device interface could exploit this flaw by sending data exceeding expected boundaries, causing an out-of-bounds write that leads to memory corruption or a denial of service (DoS).	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-24 17:08:42 UTC

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

drm/amdgpu: fix buffer overflow during vBIOS update

Clamp the buffer postion to write by setting the bin attribute
to the maximum buffer size so that VFS layer will block the
out-of-bounds accessing.

Comment 1 Mauro Matteo Cascella 2026-09-29 11:44:23 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97425.mbox