CVE-2022-39393— Wasmtime vulnerable to data leakage between instances in the pooling allocator
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I. Basic Information for CVE-2022-39393
Vulnerability Information
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Vulnerability Title
Wasmtime vulnerable to data leakage between instances in the pooling allocator
Source: NVD (National Vulnerability Database)
Vulnerability Description
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`.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在释放前未清除敏感信息
Source: NVD (National Vulnerability Database)
Vulnerability Title
Wasmtime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wasmtime是一个字节码联盟项目，它是一个独立的仅用于 WebAssembly 和 WASI 的 wasm 优化运行时。 Wasmtime 2.0.2之前的版本存在安全漏洞，该漏洞源于其池分配器中实例之间的数据泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| bytecodealliance | wasmtime | >= 2.0.0, < 2.0.2 | - |
II. Public POCs for CVE-2022-39393
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · bytecodealliance · 2022-11-10 · 3 CVEs total
| CVE-2022-39392 | 5.9 MEDIUM | Wasmtime vulnerable to out of bounds read/write with zero-memory-pages configuration |
| CVE-2022-39394 | 3.8 LOW | wasmtime_trap_code C API function has out of bounds write vulnerability |
IV. Related Vulnerabilities
Same product: wasmtime
- CVE-2026-35195
Wasmtime has an out-of-bounds write or crash when transcodin - CVE-2026-35186
Wasmtime has an improperly masked return value from `table.g - CVE-2026-34988
Wasmtime leaks data between pooling allocator instances - CVE-2026-34987
Wasmtime with Winch compiler backend on aarch64 may allow a - CVE-2026-34983
Wasmtime has a use-after-free bug after cloning `wasmtime::L
Same vendor: bytecodealliance
- CVE-2026-35195
Wasmtime has an out-of-bounds write or crash when transcodin - CVE-2026-35186
Wasmtime has an improperly masked return value from `table.g - CVE-2026-34988
Wasmtime leaks data between pooling allocator instances - CVE-2026-34987
Wasmtime with Winch compiler backend on aarch64 may allow a - CVE-2026-34983
Wasmtime has a use-after-free bug after cloning `wasmtime::L
Same weakness: CWE-226
V. Comments for CVE-2022-39393
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