# CVE-2022-33981: Use after free in n/a

> A concurrency use-after-free flaw in the Linux kernel floppy driver allows attackers to cause a denial of service.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **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:** 18 Jun 2022
- **Updated:** 5 May 2025
- **Also known as:** AZL-9952, CVE-2022-1836, DEBIAN-CVE-2022-33981, GHSA-f8p8-qq4c-94wg, UBUNTU-CVE-2022-33981

## What is CVE-2022-33981?

CVE-2022-33981 is a low-severity use after free vulnerability in Debian Debian Linux, published on 18 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

drivers/block/floppy.c in the Linux kernel before 5.17.6 is vulnerable to a denial of service, because of a concurrency use-after-free flaw after deallocating raw_cmd in the raw_cmd_ioctl function.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2022-33981?

It affects 2 products.


Products: Debian Debian Linux, Linux kernel.

## How do I fix CVE-2022-33981?

Upgrade to a fixed version.

## Is CVE-2022-33981 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-33981 exists.

## 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-2022-33981 and fix it if it is affected.

What it is: CVE-2022-33981 is a low-severity use after free vulnerability in Debian Debian Linux, published on 18 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-33981 exists.

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-2022-33981/ (Markdown: https://insights.sbomify.com/CVE-2022-33981/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-33981
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-33981
- OSV: https://osv.dev/vulnerability/CVE-2022-33981

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-33981/
Summaries are generated and may contain mistakes; the official description above is the record.