# CVE-2022-42329: Denial of service in Linux

> Guests can trigger a deadlock in the Linux netback driver when netpoll is active, causing a denial of service.

- **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:** 7 Dec 2022
- **Updated:** 14 Oct 2026
- **Also known as:** AZL-11584, DEBIAN-CVE-2022-42329, GHSA-ghhc-93hq-6rqv, OESA-2023-1014, UBUNTU-CVE-2022-42329

## What is CVE-2022-42329?

CVE-2022-42329 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 7 Dec 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Guests can trigger deadlock in Linux netback driver T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packet dropped due to the XSA-392 handling (CVE-2022-42328). Additionally when dropping packages for other reasons the same deadlock could occur in case of netpoll being active for the interface the xen-netback driver is connected to (CVE-2022-42329).

Weakness: CWE-667 (Improper Locking)

## Which versions are affected by CVE-2022-42329?

It affects 2 products.


Products: Debian Debian Linux, Linux kernel.

## How do I fix CVE-2022-42329?

Apply the vendor's patch.

## Is CVE-2022-42329 being exploited?

There is no known exploitation of CVE-2022-42329 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-2022-42329 and fix it if it is affected.

What it is: CVE-2022-42329 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 7 Dec 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-2022-42329 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-2022-42329/ (Markdown: https://insights.sbomify.com/CVE-2022-42329/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-42329
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-42329
- OSV: https://osv.dev/vulnerability/CVE-2022-42329

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-42329/
Summaries are generated and may contain mistakes; the official description above is the record.