# CVE-2025-2240: Smallrye-fault-tolerance: smallrye fault tolerance

> Attackers can cause denial of service by repeatedly calling the metrics URI, leading to memory exhaustion in Smallrye Fault Tolerance.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Mar 2025
- **Updated:** 20 Oct 2026
- **Also known as:** CLEANSTART-2026-IM74349, CLEANSTART-2026-ST40024, GHSA-gfh6-3pqw-x2j4

## What is CVE-2025-2240?

CVE-2025-2240 is a high-severity denial of service vulnerability in Red Hat Build of Apache Camel 4.8 for Quarkus 3.15, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-1325 (Improperly Controlled Sequential Memory Allocation)

## Which versions are affected by CVE-2025-2240?

4 open source packages ship an affected version, including io.smallrye:smallrye-fault-tolerance-core.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `io.smallrye:smallrye-fault-tolerance-core` | Maven | From 6.3.0 | 6.4.2 |
| `io.smallrye:smallrye-fault-tolerance-core` | Maven | From 6.3.0 | 6.4.2 |
| `io.smallrye:smallrye-fault-tolerance-core` | Maven | From 6.5.0 | 6.9.0 |
| `io.smallrye:smallrye-fault-tolerance-core` | Maven | From 6.5.0 | 6.9.0 |

## How do I fix CVE-2025-2240?

Upgrade io.smallrye:smallrye-fault-tolerance-core to a fixed version for your release line: 6.4.2 or 6.9.0.

## Is CVE-2025-2240 being exploited?

There is no known exploitation of CVE-2025-2240 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-2240 and fix it if it is affected.

What it is: CVE-2025-2240 is a high-severity denial of service vulnerability in Red Hat Build of Apache Camel 4.8 for Quarkus 3.15, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-2240 in the wild and no public exploit code.

Affected packages and fixed versions:
- io.smallrye:smallrye-fault-tolerance-core (Maven): affected from 6.3.0; fixed in 6.4.2
- io.smallrye:smallrye-fault-tolerance-core (Maven): affected from 6.3.0; fixed in 6.4.2
- io.smallrye:smallrye-fault-tolerance-core (Maven): affected from 6.5.0; fixed in 6.9.0
- io.smallrye:smallrye-fault-tolerance-core (Maven): affected from 6.5.0; fixed in 6.9.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-2240/ (Markdown: https://insights.sbomify.com/CVE-2025-2240/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-2240
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-2240
- OSV: https://osv.dev/vulnerability/CVE-2025-2240

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-2240/
Summaries are generated and may contain mistakes; the official description above is the record.