AIKIDO-2026-272372
wasmtime is vulnerable to Denial of Service (DoS)
57
Medium Risk
This Affects:
wasmtimeTL;DR
Wasmtime's Cranelift backend fails to reload accumulated fuel after a call_ref call or when control returns along a try_table catch path, dropping fuel usage incurred inside the callee. A guest using fuel metering with the call_ref or try_table opcodes can run for exponential time on linear fuel, defeating timeout and periodic yield enforcement. The fix reloads the fuel counter after call_ref calls and at catch block entry so consumed fuel is always accounted.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you enable fuel based metering (Config::consume_fuel) for guests using the call_ref or try_table Wasm opcodes.
Background info
wasmtime is vulnerable to Denial of Service (DoS) in versions 47.0.0 - 48.0.2 and 49.0.0 - 49.0.0.
How to fix this
Upgrade the wasmtime library to the patch version.
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