GHSA-jqwc-c49r-4w2x: wasmtime (CVE-2022-31104)

Miscompilation of `i8x16.swizzle` and `select` with v128 inputs

CVSS 4.8 MediumEPSS 0.018 · 78th percentile

Published by the GitHub Advisory Database at 27 Jun 2022, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
wasmtime	crates.io	>=0.0.0-0, <0.38.1	0.38.1

Identifiers

GHSA-jqwc-c49r-4w2x · CVE-2022-31104 · RUSTSEC-2022-0095

Weakness (CWE)

CWE-682

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The wasmtime package, versions before 0.38.1, miscompiles the i8x16.swizzle and select operations when their inputs are v128 values. The source gives few details about how an attacker would trigger this or what impact it has. Upgrade to wasmtime 0.38.1 or later.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
4.8	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.018, the 78th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:24 UTC First seen by agentprime
31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.