CVE-2020-35859

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-31 · updated 2026-06-17
Weakness: CWE-125

Description

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.

Affected products

Lucet-Runtime-Internals Project Lucet-Runtime-Internals: before 0.5.1 — fixed in 0.5.1

How to fix

Upgrade to a fixed version: Lucet-Runtime-Internals Project Lucet-Runtime-Internals 0.5.1. Check the vendor advisory for mitigations.

References

https://rustsec.org/advisories/RUSTSEC-2020-0004.html
https://rustsec.org/advisories/RUSTSEC-2020-0004.html

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