CVE-2022-39394

published 2022-11-10

CVE-2022-39394: 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…

Priority P3 48 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

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

7 ranges

Vendor	Product	Version range	Fixed in
bytecodealliance	wasmtime	< 2.0.2	2.0.2
bytecodealliance	wasmtime	< 1.0.2	1.0.2
bytecodealliance	wasmtime	>= 0 < 1.0.2	1.0.2
bytecodealliance	wasmtime	>= 0.0.0-0 < 1.0.2	1.0.2
bytecodealliance	wasmtime	>= 2.0.0 < 2.0.2	2.0.2
bytecodealliance	wasmtime	>= 2.0.0 < 2.0.2	2.0.2
debian	rust-wasmtime	—	—

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

osv 9.8 CRITICAL

vendor_debian 3.8 LOW

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-787