Bug 2525449 (CVE-2026-80705)

Summary: CVE-2026-80705 kernel: drm/amd/display: check if dml21_add_phantom_plane() is successful
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's drm/amd/display component. This vulnerability arises from an insufficient check during the allocation of a 'phantom plane' within the display driver. If the allocation fails and this failure is not properly handled, it can lead to a system crash, resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-28 07:45:33 UTC
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: check if dml21_add_phantom_plane() is successful

Verify that the phantom plane was allocated to avoid a later
segfault.

(cherry picked from commit 5adb54abe5a8e82cbff7f8806db30a5f4924329f)