Wasmtime is a standalone runtime for WebAssembly. Prior to version 2.0.2, there is a bug in Wasmtime's C API implementation where the definition of the `wasmtime_trap_code` does not match its declared signature in the `wasmtime/trap.h` header file. This discrepancy causes the function implementation to perform a 4-byte write into a 1-byte buffer provided by the caller. This can lead to three zero bytes being written beyond the 1-byte location provided by the caller. This bug has been patched and users should upgrade to Wasmtime 2.0.2. This bug can be worked around by providing a 4-byte buffer casted to a 1-byte buffer when calling `wasmtime_trap_code`. Users of the `wasmtime` crate are not affected by this issue, only users of the C API function `wasmtime_trap_code` are affected.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2022-11-10T00:00:00

Updated: 2024-08-03T12:07:41.252Z

Reserved: 2022-09-02T00:00:00

Link: CVE-2022-39394

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2022-11-10T20:15:11.850

Modified: 2022-11-16T13:31:56.167

Link: CVE-2022-39394

cve-icon Redhat

No data.