CVE-2022-39393

Summary

Wasmtime is a standalone runtime for WebAssembly. Prior to versions 2.0.2 and 1.0.2, there is a bug in Wasmtime's implementation of its pooling instance allocator where when a linear memory is reused for another instance the initial heap snapshot of the prior instance can be visible, erroneously to the next instance. This bug has been patched and users should upgrade to Wasmtime 2.0.2 and 1.0.2. Other mitigations include disabling the pooling allocator and disabling the memory-init-cow.

Affected Software

VendorProductVersion RangeStatus
bytecodealliancewasmtime>= 2.0.0, < 2.0.2affected
bytecodealliancewasmtime< 1.0.2affected

Weaknesses

  • CWE-226: CWE-226: Sensitive Information in Resource Not Removed Before Reuse

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References