GHSA-xfhw-6mc4-mgxf is a high-severity (CVSS 7.5) vulnerability in crayon. No vendor fix is recorded yet; mitigation options are listed below.
crayon: ObjectPool creates uninitialized memory when freeing objects
Real-World Exposure
crayonReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
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
No patched version of crayon has shipped for GHSA-xfhw-6mc4-mgxf yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-xfhw-6mc4-mgxf can be triaged on real exposure rather than presence alone.
Tailored to GHSA-xfhw-6mc4-mgxf. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-xfhw-6mc4-mgxf in your dependencies?
O3 Security finds GHSA-xfhw-6mc4-mgxf across crates.io dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.