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CVE PROGRAM SOURCE RECORD9.4 Critical

CVE-2026-115384

Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 Stack Buffer Overflow

Description

Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a stack buffer overflow vulnerability that allows malicious guests to write ~16KB to the native stack via unvalidated async callback result types. Attackers can supply components with mistyped component-model-async callback functions to overwrite return addresses, crashing the host or escaping the sandbox.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

bytecodealliance wasmtime

Default version status: unaffected

  • 39.0.0 to < 48.0.4affected
  • 48.0.4unaffected
  • 49.0.0 to < 49.0.2affected
  • 49.0.2unaffected
pkg:cargo/wasmtime

References