CVE-2024-47813

Summary

CVE-2024-47813 impacted Wasmtime, an open-source WebAssembly runtime. A race condition in the internal type registry of `wasmtime::Engine` led to double-unregistration bugs and potential corruption, threatening control-flow integrity (CFI) and type safety. This issue occurred when creating and dropping multiple types concurrently on multiple threads, using the same engine. Wasm guests were not affected. The bug, introduced during the development of Wasmtime 19's WebAssembly GC proposal, affected users regardless of the GC proposal status and affected Wasmtime versions 19.0.0 and later. Users creating and dropping Wasmtime types on multiple threads concurrently had no known workarounds but were encouraged to upgrade to a patched release, including versions 21.0.2, 22.0.1, 23.0.3, 24.0.1, and 25.0.2.

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