CVEvulnerability

CVE-2022-39394

9.8 CRITICAL Published 2022-11-10 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-11-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.8 LOW — CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-787

Description

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.

Affected configurations

• bytecodealliance wasmtime (< 1.0.2) • bytecodealliance wasmtime (>= 2.0.0 < 2.0.2)

Related

Weakness · CWE (1)

  • CWE-787 Out-of-bounds Write weakness

References