# CVE-2022-42324: Integer overflow in xen

> An integer truncation flaw in Oxenstored causes a busy-loop denial of service when processing malformed packets on 32-bit systems.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Nov 2022
- **Updated:** 3 Aug 2024
- **Also known as:** ALPINE-CVE-2022-42324, DEBIAN-CVE-2022-42324, GHSA-2hqj-m7qj-9pc3, UBUNTU-CVE-2022-42324

## What is CVE-2022-42324?

CVE-2022-42324 is a medium-severity vulnerability in Debian Debian Linux, published on 1 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Oxenstored 32->31 bit integer truncation issues Integers in Ocaml are 63 or 31 bits of signed precision. The Ocaml Xenbus library takes a C uint32_t out of the ring and casts it directly to an Ocaml integer. In 64-bit Ocaml builds this is fine, but in 32-bit builds, it truncates off the most significant bit, and then creates unsigned/signed confusion in the remainder. This in turn can feed a negative value into logic not expecting a negative value, resulting in unexpected exceptions being thrown. The unexpected exception is not handled suitably, creating a busy-loop trying (and failing) to take the bad packet out of the xenstore ring.

Weakness: CWE-681 (Incorrect Conversion between Numeric Types)

## Which versions are affected by CVE-2022-42324?

It affects 3 products.


Products: Debian Debian Linux, Fedoraproject Fedora, Xen Xen.

## How do I fix CVE-2022-42324?

Apply the vendor's patch.

## Is CVE-2022-42324 being exploited?

There is no known exploitation of CVE-2022-42324 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-42324 and fix it if it is affected.

What it is: CVE-2022-42324 is a medium-severity vulnerability in Debian Debian Linux, published on 1 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-42324 in the wild and no public exploit code.

Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2022-42324/ (Markdown: https://insights.sbomify.com/CVE-2022-42324/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-42324
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-42324
- OSV: https://osv.dev/vulnerability/CVE-2022-42324

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-42324/
Summaries are generated and may contain mistakes; the official description above is the record.