# CVE-2022-47021: Null dereference in n/a

> Attackers can cause denial of service via null pointer dereference in opusfile library functions.

- **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:** 20 Jan 2023
- **Updated:** 3 Apr 2025
- **Also known as:** ALPINE-CVE-2022-47021, DEBIAN-CVE-2022-47021, GHSA-4j99-9c7q-m4qw, JLSEC-2026-1266, MGASA-2023-0042, OESA-2023-1062, UBUNTU-CVE-2022-47021, USN-5937-1, openSUSE-SU-2024:0013-1, openSUSE-SU-2024:12799-1

## What is CVE-2022-47021?

CVE-2022-47021 is a high-severity vulnerability in Fedoraproject Fedora, published on 20 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A null pointer dereference issue was discovered in functions op_get_data and op_open1 in opusfile.c in xiph opusfile 0.9 thru 0.12 allows attackers to cause denial of service or other unspecified impacts.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2022-47021?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `opusfile` | SUSE:Package Hub 15 SP5 | All versions | 0.12-bp155.3.3.1 |
| `opusfile` | openSUSE:Leap 15.5 | All versions | 0.12-bp155.3.3.1 |

Products: Fedoraproject Fedora, Xiph Opusfile.

## How do I fix CVE-2022-47021?

Upgrade to a fixed version.

## Is CVE-2022-47021 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-47021 exists.

## 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-2022-47021 and fix it if it is affected.

What it is: CVE-2022-47021 is a high-severity vulnerability in Fedoraproject Fedora, published on 20 Jan 2023. 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-2022-47021 exists.

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-2022-47021/ (Markdown: https://insights.sbomify.com/CVE-2022-47021/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-47021
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-47021
- OSV: https://osv.dev/vulnerability/CVE-2022-47021

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-47021/
Summaries are generated and may contain mistakes; the official description above is the record.