hermit-os/uhyve

Verify that null-terminated strings in the hypercall don't leak non-vm memory

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#1,459 opened on Aug 19, 2026

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good first issue

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Description

Likely fix: in fn decode_guest_path check that the length of the CStr + the path start address does not exceed the memory.

Originally posted by @jounathaen in https://github.com/hermit-os/uhyve/pull/1456#discussion_r3812358307

Contributor guide

Research direction
Read the `decode guest path` function to understand how guest memory is accessed, then check that the CStr length plus start address stays within the allocated VM memory.
Tech stack
rust
Domain
operating systemssecurity
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitRust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75