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Security Advisories: GSA_kwCzR0hTQS01ZmhqLWczcDMtcHE5Z84AAtg8

Wasmtime vulnerable to Use After Free with `externref`s

There is a bug in Wasmtime's code generator, Cranelift, where functions using reference types may be incorrectly missing metadata required for runtime garbage collection (GC). This means that if a GC happens at runtime then the collector will mistakenly think some Wasm stack frames do not have live references to garbage collected values and therefore reclaim and deallocate them. The function can then subsequently continue to use the values, leading later to use-after-free bugs. This bug was introduced in Cranelift's migration to the regalloc2 register allocator in the Wasmtime 0.37.0 release on 2022-05-20. This bug has been patched and users should upgrade to Wasmtime version 0.38.2.

Mitigations for this issue can be achieved by doing one of:

Permalink: https://github.com/advisories/GHSA-5fhj-g3p3-pq9g
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS01ZmhqLWczcDMtcHE5Z84AAtg8
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 1 year ago
Updated: about 1 year ago


CVSS Score: 6.4
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L

Identifiers: GHSA-5fhj-g3p3-pq9g, CVE-2022-31146
References: Repository: https://github.com/bytecodealliance/wasmtime

Affected Packages

cargo:cranelift-codegen
Dependent packages: 55
Dependent repositories: 3,397
Downloads: 10,099,138 total
Affected Version Ranges: >= 0.84.0, < 0.85.2
Fixed in: 0.85.2
All affected versions: 0.84.0, 0.85.0, 0.85.1
All unaffected versions: 0.14.0, 0.15.0, 0.16.0, 0.16.1, 0.17.0, 0.18.1, 0.19.0, 0.20.0, 0.21.0, 0.21.1, 0.22.0, 0.23.0, 0.24.0, 0.25.0, 0.26.0, 0.27.0, 0.28.0, 0.29.0, 0.30.0, 0.31.0, 0.32.0, 0.33.0, 0.34.0, 0.35.0, 0.36.0, 0.37.0, 0.38.0, 0.39.0, 0.40.0, 0.41.0, 0.42.0, 0.43.0, 0.43.1, 0.44.0, 0.45.0, 0.46.0, 0.46.1, 0.47.0, 0.48.0, 0.49.0, 0.50.0, 0.51.0, 0.52.0, 0.53.0, 0.54.0, 0.55.0, 0.56.0, 0.58.0, 0.59.0, 0.60.0, 0.61.0, 0.62.0, 0.63.0, 0.64.0, 0.65.0, 0.66.0, 0.67.0, 0.68.0, 0.69.0, 0.70.0, 0.71.0, 0.72.0, 0.73.0, 0.73.1, 0.74.0, 0.75.0, 0.76.0, 0.77.0, 0.78.0, 0.79.0, 0.79.1, 0.80.0, 0.80.1, 0.81.0, 0.81.1, 0.81.2, 0.82.0, 0.82.1, 0.82.2, 0.82.3, 0.83.0, 0.85.2, 0.85.3, 0.86.0, 0.86.1, 0.87.0, 0.87.1, 0.88.0, 0.88.1, 0.88.2, 0.89.0, 0.89.1, 0.89.2, 0.90.0, 0.90.1, 0.91.0, 0.91.1, 0.92.0, 0.92.1, 0.93.0, 0.93.1, 0.93.2, 0.94.0, 0.94.1, 0.95.0, 0.95.1, 0.96.0, 0.96.1, 0.96.2, 0.96.3, 0.96.4, 0.97.0, 0.97.1, 0.97.2, 0.98.0, 0.98.1, 0.98.2, 0.99.0, 0.99.1, 0.99.2, 0.100.0, 0.100.1, 0.101.0, 0.101.1, 0.101.2, 0.101.3, 0.101.4, 0.102.0, 0.102.1, 0.103.0, 0.104.0, 0.104.1, 0.104.2, 0.105.0, 0.105.1, 0.105.2, 0.105.3
cargo:wasmtime
Dependent packages: 126
Dependent repositories: 2,459
Downloads: 6,282,542 total
Affected Version Ranges: >= 0.37.0, < 0.38.2
Fixed in: 0.38.2
All affected versions: 0.37.0, 0.38.0, 0.38.1
All unaffected versions: 0.0.0, 0.3.0, 0.7.0, 0.8.0, 0.9.0, 0.10.0, 0.11.0, 0.12.0, 0.13.0, 0.15.0, 0.16.0, 0.17.0, 0.18.0, 0.19.0, 0.20.0, 0.21.0, 0.22.0, 0.23.0, 0.24.0, 0.25.0, 0.26.0, 0.26.1, 0.27.0, 0.28.0, 0.29.0, 0.30.0, 0.31.0, 0.32.0, 0.32.1, 0.33.0, 0.33.1, 0.34.0, 0.34.1, 0.34.2, 0.35.0, 0.35.1, 0.35.2, 0.35.3, 0.36.0, 0.38.2, 0.38.3, 0.39.0, 0.39.1, 0.40.0, 0.40.1, 1.0.0, 1.0.1, 1.0.2, 2.0.0, 2.0.1, 2.0.2, 3.0.0, 3.0.1, 4.0.0, 4.0.1, 5.0.0, 5.0.1, 6.0.0, 6.0.1, 6.0.2, 7.0.0, 7.0.1, 8.0.0, 8.0.1, 9.0.0, 9.0.1, 9.0.2, 9.0.3, 9.0.4, 10.0.0, 10.0.1, 10.0.2, 11.0.0, 11.0.1, 11.0.2, 12.0.0, 12.0.1, 12.0.2, 13.0.0, 13.0.1, 14.0.0, 14.0.1, 14.0.2, 14.0.3, 14.0.4, 15.0.0, 15.0.1, 16.0.0, 17.0.0, 17.0.1, 17.0.2, 18.0.0, 18.0.1, 18.0.2, 18.0.3