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CVE-2023-53552 is a use-after-free vulnerability in the Linux kernel Intel i915 DRM driver’s handling of GuC virtual-engine requests. Userspace may retain i915 request references through synchronization fences or DMA-BUF reservation objects after request completion, including across processes. Fence-release processing subsequently needs to distinguish requests associated with physical hardware engines from virtual-engine requests, but an engine reference may no longer be valid. The fix records virtual-engine status in an additional request execution-mask bit, allowing release handling to identify virtual requests without dereferencing an invalid engine pointer.
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A use-after-free vulnerability in the Linux kernel DRM i915 driver involving requests for GuC virtual engines.
Use-after-free vulnerability in the Linux kernel Intel i915 DRM driver's GuC virtual-engine request handling.
A use-after-free vulnerability affecting Linux kernel DRM/i915 requests for GuC virtual engines.
A use-after-free vulnerability in the Linux kernel DRM i915 graphics driver involving GuC virtual-engine requests and i915_request references retained through sync_file or dmabuf/dma-resv objects. The fix marks virtual-engine requests in execution_mask so fence release can safely determine whether rq->engine remains valid.
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Cross-references every affected SKU, including bundled OEM variants.
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