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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 sync_file or dma-buf reservation objects after request completion. During fence release, the driver must determine whether the request engine pointer remains valid and references a hardware engine. Virtual-engine requests were not explicitly marked, creating a risk that fence-release logic could rely on an invalid engine pointer. The fix adds a virtual-engine marker in the request execution mask so fence-release handling can identify virtual requests without dereferencing the engine pointer.
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Linux kernel vulnerability addressed by the referenced AlmaLinux/TuxCare update.
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.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.