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Advisories

Wasmtime before 36.0.20 Denial of Service via Borrowed Resource Transfer

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Severity
medium
Date
Affecting

  • wasmtime >= 0, < 36.0.20

  • wasmtime >= 37.0.0, < 48.0.8

  • wasmtime >= 49.0.0, < 49.0.5

  • wasmtime >= 50.0.0, < 50.0.1

CWE
  • CWE-770 Allocation of Resources Without Limits or Throttling
CVSS
5.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
Wasmtime before 36.0.20, 37.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 allocates untracked host memory when a component receives a borrow of a resource it defines itself, bypassing the per-store handle limit. A malicious guest component can repeatedly transfer such borrowed resources to consume arbitrary host memory, causing denial of service.

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