crayon: ObjectPool creates uninitialized memory when freeing objectsGHSA-xfhw-6mc4-mgxf
HIGHFix: shawnscode/crayon@c2fde19GHSA-xfhw-6mc4-mgxf is a high-severity (CVSS 7.5) vulnerability in crayon. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
Real-World Exposure
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Description
As of version 0.6.0, the ObjectPool explicitly creates an uninitialized instance of its type parameter when it attempts to free an object, and swaps it into the storage. This causes instant undefined behavior due to reading the uninitialized memory in order to write it to the pool storage.
Extremely basic usage of the crate can trigger this issue, e.g. this code from a doctest:
use crayon::prelude::*;
application::oneshot().unwrap();
let mut params = MeshParams::default();
let mesh = video::create_mesh(params, None).unwrap();
// Deletes the mesh object.
video::delete_mesh(mesh); // <-- UB
The Clippy warning for this code was silenced in commit c2fde19caf6149d91faa504263f0bc5cafc35de5.
Discovered via https://asan.saethlin.dev/ub?crate=crayon&version=0.7.1
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | crayon | ≥ 0.6.0 | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for crayon, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of crayon for GHSA-xfhw-6mc4-mgxf. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is GHSA-xfhw-6mc4-mgxf in your dependencies?
Find it across crates.io, including transitive dependencies.