# CVE-2022-0084: XNIO `notifyReadClosed` method logging message to unexpected end

> An attacker can cause disk fill-up or performance degradation by sending flawed requests that trigger excessive logging in the XNIO library.

- **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:** 26 Aug 2022
- **Updated:** 2 Aug 2024
- **Also known as:** DEBIAN-CVE-2022-0084, GHSA-76fg-mhrg-fmmg, OESA-2026-1047, UBUNTU-CVE-2022-0084

## What is CVE-2022-0084?

CVE-2022-0084 is a high-severity denial of service vulnerability in Redhat Single Sign-On, published on 26 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in XNIO, specifically in the notifyReadClosed method. The issue revealed this method was logging a message to another expected end. This flaw allows an attacker to send flawed requests to a server, possibly causing log contention-related performance concerns or an unwanted disk fill-up.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2022-0084?

2 open source packages ship an affected version, including org.jboss.xnio:xnio-all. It affects 4 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.jboss.xnio:xnio-all` | Maven | All versions to 3.8.7.Final | None |
| `org.jboss.xnio:xnio-all` | Maven | All versions to 3.8.7.Final | None |

Products: Redhat Integration Camel K, Redhat Integration Camel Quarkus, Redhat Single Sign-On, Redhat Xnio.

## How do I fix CVE-2022-0084?

Upgrade to a fixed version.

## Is CVE-2022-0084 being exploited?

There is no known exploitation of CVE-2022-0084 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Single Sign-On

- [CVE-2022-2053](https://insights.sbomify.com/CVE-2022-2053/): Undertow vulnerable to Dos via Large AJP request (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-0084 and fix it if it is affected.

What it is: CVE-2022-0084 is a high-severity denial of service vulnerability in Redhat Single Sign-On, published on 26 Aug 2022. 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-2022-0084 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.jboss.xnio:xnio-all (Maven): affected all versions up to 3.8.7.Final; no fix listed
- org.jboss.xnio:xnio-all (Maven): affected all versions up to 3.8.7.Final; no fix listed

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-2022-0084/ (Markdown: https://insights.sbomify.com/CVE-2022-0084/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-0084
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-0084
- OSV: https://osv.dev/vulnerability/CVE-2022-0084

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-0084/
Summaries are generated and may contain mistakes; the official description above is the record.