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Advisories

Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Async-Entrypoint Enforcement Bypass

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Severity
medium
Date
Affecting

  • wasmtime >= 42.0.0, < 48.0.6

  • wasmtime >= 49.0.0, < 49.0.3

CWE
  • CWE-1265 Unintended Reentrant Invocation of Non-reentrant Code Via Nested Calls
CVSS
5.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains insufficient checks in Store when mixing async-style and sync-style WebAssembly calls. Embedders re-entering WebAssembly via sync APIs from host functions called asynchronously can trigger runtime panics or unsound cross-thread movement of !Send host variables.

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