CVE-2022-39393
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`.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | sid | fixed | 0 |
| debian | trixie | fixed | 0 |
| debian | forky | fixed | 0 |
References
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-wh6w-3828-g9qf
- https://nvd.nist.gov/vuln/detail/CVE-2022-39393
- https://github.com/bytecodealliance/wasmtime/commit/2614f2e9d2d36805ead8a8da0fa0c6e0d9e428a0
- https://github.com/bytecodealliance/wasmtime/commit/3535acbf3be032ef1ba0b469b8ab92538a8a18a6
- https://github.com/bytecodealliance/wasmtime
- https://groups.google.com/a/bytecodealliance.org/g/sec-announce/c/c1HBDDJwNPA
- https://rustsec.org/advisories/RUSTSEC-2022-0075.html
- https://rustsec.org/advisories/RUSTSEC-2022-0098.html
- https://crates.io/crates/wasmtime
- https://security-tracker.debian.org/tracker/CVE-2022-39393
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.