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CVE-2023-52771 is a race condition in the Linux kernel Compute Express Link (CXL) port subsystem. During teardown of a CXL endpoint, memory device, or ancestor port, delete_endpoint() may need to acquire the endpoint parent device lock while that parent is concurrently being unregistered. The affected logic did not retain a reference to the parent device before using it, permitting use-after-free behavior. In Root Complex Hosted (RCH) topologies, the code could also select the wrong parent device for locking. The fix retains a reference to the endpoint parent and locks endpoint->dev.parent where required.
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Race condition between CXL endpoint deletion and parent unregistration in the Linux kernel.
Linux kernel Compute Express Link (CXL) port race condition between delete_endpoint() and parent unregistration.
A race condition between endpoint deletion and parent unregistration in the Linux kernel CXL port subsystem.
Linux kernel CXL port race condition between endpoint deletion and parent unregistration.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.