GHSA-m325-rxjv-pwph
GHSA-m325-rxjv-pwph is a CWE-908 vulnerability in messagepack-rs. O3 Security confirms whether GHSA-m325-rxjv-pwph is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Deserialization functions pass uninitialized memory to user-provided Read
Blast Radius
messagepack-rsReal-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
Affected versions of this crate passed an uninitialized buffer to a
user-provided Read instance in:
deserialize_binarydeserialize_stringdeserialize_extension_othersdeserialize_string_primitive
This can result in safe Read implementations reading from the uninitialized
buffer leading to undefined behavior.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | messagepack-rs | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for messagepack-rs. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of messagepack-rs has shipped for GHSA-m325-rxjv-pwph 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 pinpoints whether GHSA-m325-rxjv-pwph is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-m325-rxjv-pwph. 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-m325-rxjv-pwph in your dependencies?
O3 detects GHSA-m325-rxjv-pwph across crates.io dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.