Missing Release of Resource after Effective Lifetime Affecting wasmtime package, versions >=37.0.0 <37.0.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-WASMTIME-13517510
- published10 Oct 2025
- disclosed7 Oct 2025
- creditUnknown
Introduced: 7 Oct 2025
NewCVE-2025-61670 (opens in a new tab)How to fix?
Upgrade wasmtime to version 37.0.2 or higher.
Overview
Affected versions of this package are vulnerable to Missing Release of Resource after Effective Lifetime in the unroot operation of the wasmtime_val_unroot() function. A permanent memory leak can occur when bindings of externref or anyref WebAssembly values are used in the C/C++ API, leading to resource exhaustion over time.