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Advisories

Wasmtime 47.0.0 before 48.0.8 Cross-Engine Type Confusion via StructType Supertype

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Severity
low
Date
Affecting

  • wasmtime >= 47.0.0, < 48.0.8

  • wasmtime >= 49.0.0, < 49.0.5

  • wasmtime >= 50.0.0, < 50.0.1

CWE
  • CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
CVSS
1.8
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Description
Wasmtime 47.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 contains a cross-engine type confusion vulnerability because StructType::with_finality_and_supertype does not validate that the supplied supertype belongs to the same Engine. Embedders using multiple engines that create a GC struct type with another engine's supertype can trigger runtime panics or GC heap corruption, causing denial of service; guest WebAssembly cannot trigger it.

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