GHSA-c738-77x8-wmq5
MEDIUMGHSA-c738-77x8-wmq5 is a medium-severity (CVSS 5.9) Uncontrolled Resource Consumption vulnerability in org.jboss.xnio:xnio-nio. O3 Security confirms whether GHSA-c738-77x8-wmq5 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Uncontrolled Resource Consumption in XNIO
Real-World Exposure
org.jboss.xnio:xnio-nio☕org.jboss.xnio:xnio-nioReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
A vulnerability was discovered in XNIO where file descriptor leak caused by growing amounts of NIO Selector file handles between garbage collection cycles. It may allow the attacker to cause a denial of service. It affects XNIO versions 3.6.0.Beta1 through 3.8.1.Final.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.jboss.xnio:xnio-nio | ≥ 3.8.0.Final&&< 3.8.2.Final | 3.8.2.Final |
| ☕Maven | org.jboss.xnio:xnio-nio | ≥ 3.6.0&&< 3.7.9.Final | 3.7.9.Final |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jboss.xnio:xnio-nio. 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.
Fix
Update org.jboss.xnio:xnio-nio to 3.8.2.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c738-77x8-wmq5 is resolved across your whole dependency graph.
Workarounds
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-c738-77x8-wmq5 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-c738-77x8-wmq5. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Frequently Asked Questions
Is GHSA-c738-77x8-wmq5 in your dependencies?
O3 detects GHSA-c738-77x8-wmq5 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.