Description (CNA)
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the dynamically-typed Val API, bypassing the hostcall fuel limit. A malicious WebAssembly guest can return crafted values that allocate at least ~100x more host memory than tracked, causing denial of service.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| bytecodealliance / wasmtime | affected 0 before 36.0.16; unaffected 36.0.16; affected 37.0.0 before 48.0.3; unaffected 48.0.3; affected 49.0.0 before 49.0.1; unaffected 49.0.1 |
CWE
CWE-770