CVE-2022-39393
High
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`.
SeverityHigh
CVSS8.6
Exploit probability—
ProductBytecodealliance Wasmtime
PublishedNov 10, 2022
First seenNov 10, 2022
Weakness typeCWE-226CWE-226
How to fix
Update
- bytecodealliance wasmtime1.0.2, 2.0.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bytecodealliance wasmtime | v < 1.0.2, 2.0.0 ≤ v < 2.0.2 | 1.0.2, 2.0.2 |
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