drm/vc4: hvs/v3d: Fix null dereference in unbind

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Summary

CVECVE-2026-68303
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:20:19 UTC
Updated2026-08-17 05:18:33 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/vc4: hvs/v3d: Fix null dereference in unbind The hvs and v3d drivers use dev_get_drvdata(master) in their unbind functions. Since the vc4-drm gets removed before its dependent drivers (vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to get drvdata of its master and fails with a null dereference error. Use the data pointer passed to the unbind functions directly instead of dev_get_drvdata(master). This avoids using potentially freed memory.

Risk And Classification

EPSS: 0.001890000 probability, percentile 0.088810000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c8b75bca92cbf064b9fa125fc74a85994452e935 261f0a3f0ac03248284f5116d3258f89c9642215 git Not specified
CNA Linux Linux affected c8b75bca92cbf064b9fa125fc74a85994452e935 7dc3680b7ffe01add3e9299fde8471d2dd53a8ae git Not specified
CNA Linux Linux affected 4.4 Not specified
CNA Linux Linux unaffected 4.4 semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/261f0a3f0ac03248284f5116d3258f89c9642215 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7dc3680b7ffe01add3e9299fde8471d2dd53a8ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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