critical

CVE-2022-39394

wasmtime_trap_code C API function has out of bounds write vulnerability

Published 10 Nov 2022Modified 17 Jun 2026CWE 787

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

GHSA3.8CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by GHSA (low).

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 packages and fixed versions

Source	Package	Fixed in
cargo::GitHub Security Advisory Rust	wasmtime	2.0.2, 1.0.2
conan::GitLab Advisory Database Community	wasmtime	no fix listed
rapidfort ubuntu 20.04	thunderbird	no fix listed
rapidfort ubuntu 22.04	thunderbird	no fix listed
rapidfort ubuntu 24.04	thunderbird	no fix listed

References

What Attestkeep does with this

Inside your cluster, without you opening a spreadsheet.

KnowsThe scanner refreshes its vulnerability database every six hours.

FindsEvery admitted image is rescanned every 24 hours by default (scan.rescanInterval). When Trivy rates this vulnerability critical for the image's package source, it appears in the image's findings by name. Findings without a fix are left out unless includeUnfixed is on.

Tells youA critical_finding event goes to the channels subscribed to it: e-mail, Slack, Teams, a webhook, Jira, GitLab or GitHub.

RefusesWith a policy that blocks critical findings, a pod with this image is refused at admission, a rollback to it included. Pods already running are not evicted.

RecordsEach decision is recorded with the policy that ran and its hash, then sealed under a signed checkpoint.

Try Attestkeep

Read the docs