cve.bz

CVE-2022-39393

8.6 highEPSS 0.8%

High (8.6) in bytecodealliance wasmtime. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in wasmtime 1.0.2, 2.0.2.

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`.

Severity

CVSS 3.1

8.6 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS
0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
CWEs
CWE-212, CWE-226
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-wh6w-3828-g9qfcrates.iowasmtime>=2.0.0 <2.0.22.0.2
GHSA-wh6w-3828-g9qfcrates.iowasmtime<1.0.21.0.2
RUSTSEC-2022-0075crates.iowasmtime>=0.0.0-0 <1.0.2
>=2.0.0 <2.0.2		1.0.2, 2.0.2
RUSTSEC-2022-0098crates.iowasmtime>=0.0.0-0 <1.0.2
>=2.0.0 <2.0.2		1.0.2, 2.0.2

References

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