# CVE-2022-24122: Use after free in n/a

> A use-after-free in the Linux kernel allows local attackers to escalate privileges when unprivileged user namespaces are enabled.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 29 Jan 2022
- **Updated:** 3 Aug 2024
- **Also known as:** AZL-8451, DEBIAN-CVE-2022-24122, GHSA-qffg-f4f5-j77v, UBUNTU-CVE-2022-24122

## What is CVE-2022-24122?

CVE-2022-24122 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 29 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

kernel/ucount.c in the Linux kernel 5.14 through 5.16.4, when unprivileged user namespaces are enabled, allows a use-after-free and privilege escalation because a ucounts object can outlive its namespace.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2022-24122?

It affects 10 products.


Products: Fedoraproject Fedora, Linux kernel, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500e Firmware, Netapp H500s Firmware, Netapp H700e Firmware, Netapp H700s Firmware.

## How do I fix CVE-2022-24122?

Apply the vendor's patch.

## Is CVE-2022-24122 being exploited?

There is no known exploitation of CVE-2022-24122 in the wild and no public exploit code.

Public exploit code:

- CVE-2022-24122 Proof of Concept (github_poc): https://github.com/meowmeowxw/CVE-2022-24122

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-24122 and fix it if it is affected.

What it is: CVE-2022-24122 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 29 Jan 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-2022-24122 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2022-24122/ (Markdown: https://insights.sbomify.com/CVE-2022-24122/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-24122
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-24122
- OSV: https://osv.dev/vulnerability/CVE-2022-24122

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-24122/
Summaries are generated and may contain mistakes; the official description above is the record.