An issue was discovered in the lucet-runtime-internals crate before 0.5.1 for Rust.
Priority MEDIUM 42CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
An issue was discovered in the lucet-runtime-internals crate before 0.5.1 for Rust. It mishandles sigstack allocation. Guest programs may be able to obtain sensitive information, or guest programs can experience memory corruption.
Why it matters now
EPSS 0.01523 74th percentileScored 2026-11-07
Fix Fixed lucet-runtime-internals (crates.io): 0.4.3, 0.5.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | lucet-runtime-internals (crates.io) | before 0.4.3 | 0.4.3 | Patch available | GHSA-3933-wvjf-pcvc |
| — | lucet-runtime-internals (crates.io) | 0.5.0 to before 0.5.1 | 0.5.1 | Patch available | GHSA-3933-wvjf-pcvc |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- lucet-runtime-internals (crates.io) Vendor— Affected before 0.4.3 Fixed in 0.4.3 Patch available GHSA-3933-wvjf-pcvc
- lucet-runtime-internals (crates.io) Vendor— Affected 0.5.0 to before 0.5.1 Fixed in 0.5.1 Patch available GHSA-3933-wvjf-pcvc
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lucet-runtime-internals_project:lucet-runtime-internals:*:*:*:*:*:rust:*:* | before 0.5.1 | Vulnerable | Lucet-runtime-internals Project |
- cpe:2.3:a:lucet-runtime-internals_project:lucet-runtime-internals:*:*:*:*:*:rust:*:* Versions before 0.5.1 Vulnerable ·Lucet-runtime-internals Project
Remediation
- Fix · GHSA-3933-wvjf-pcvc lucet-runtime-internals (crates.io) Fixed in 0.4.3 Advisory →
- Fix · GHSA-3933-wvjf-pcvc lucet-runtime-internals (crates.io) Fixed in 0.5.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-35859
- 2026-10-03 Alias added: GHSA-3933-wvjf-pcvc
References
Sources
- CVE-2020-35859 · CVE Program
- CVE-2020-35859 · NVD
- FIRST EPSS
- GHSA-3933-wvjf-pcvc · GitHub Advisory Database · CC BY 4.0
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