CVE-2025-2240 — smallrye-fault-tolerance-…
HIGHCVE-2025-2240 is a high-severity (CVSS 7.5) CWE-1325 vulnerability in io.smallrye:smallrye-fault-tolerance-core. A fix is available for io.smallrye:smallrye-fault-tolerance-core — see the affected versions and patch details below.
Smallrye-fault-tolerance: smallrye fault tolerance
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-2240.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2025-2240 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 376,715 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
io.smallrye:smallrye-fault-tolerance-core☕io.smallrye:smallrye-fault-tolerance-coreReal-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 flaw was found in Smallrye, where smallrye-fault-tolerance is vulnerable to an out-of-memory (OOM) issue. This vulnerability is externally triggered when calling the metrics URI. Every call creates a new object within meterMap and may lead to a denial of service (DoS) issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | io.smallrye:smallrye-fault-tolerance-core | ≥ 6.3.0&&< 6.4.2 | 6.4.2io.smallrye:smallrye-fault-tolerance-core:6.4.2 |
| ☕Maven | io.smallrye:smallrye-fault-tolerance-core | ≥ 6.5.0&&< 6.9.0 | 6.9.0io.smallrye:smallrye-fault-tolerance-core:6.9.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.smallrye:smallrye-fault-tolerance-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update io.smallrye:smallrye-fault-tolerance-core to 6.4.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-2240 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2025-2240 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2025-2240. 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.
This vulnerability allows a remote attacker to cause an out-of-memory issue when calling the metrics URI, resulting in a denial of service. As this flaw can be triggered via the network, it has been rated with an important severity.
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat build of Apache Camel 4.8.5 for Spring Boot | smallrye-fault-tolerance-core | RHSA-2025:3543 |
| Red Hat Build of Apache Camel 4.8 for Quarkus 3.15 | quarkus-camel-bom | RHSA-2025:3541 |
| Red Hat build of Quarkus 3.15.4 | smallrye-fault-tolerance-core | RHSA-2025:3376 |
Frequently Asked Questions
Is CVE-2025-2240 in your dependencies?
O3 Security finds CVE-2025-2240 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.