# CVE-2022-2476: Null dereference in Wavpack

> A null pointer dereference in Wavpack allows attackers to cause a denial of service via crafted audio files.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 19 Jul 2022
- **Updated:** 3 Aug 2024
- **Also known as:** AZL-10317, CLSA-2026-1784814430, CLSA-2026-1785754254, DEBIAN-CVE-2022-2476, GHSA-62q3-hj99-8qw6, MGASA-2022-0291, OESA-2024-2514, OESA-2024-2515, OESA-2024-2516, OESA-2024-2517, SUSE-SU-2022:2681-1, SUSE-SU-2022:2682-1, UBUNTU-CVE-2022-2476, USN-5721-1

## What is CVE-2022-2476?

CVE-2022-2476 is a medium-severity vulnerability in Fedoraproject Fedora, published on 19 Jul 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A null pointer dereference bug was found in wavpack-5.4.0 The results from the ASAN log: AddressSanitizer:DEADLYSIGNAL ===================================================================84257==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x561b47a970c6 bp 0x7fff13952fb0 sp 0x7fff1394fca0 T0) ==84257==The signal is caused by a WRITE memory access. ==84257==Hint: address points to the zero page. #0 0x561b47a970c5 in main cli/wvunpack.c:834 #1 0x7efc4f5c0082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082) #2 0x561b47a945ed in _start (/usr/local/bin/wvunpack+0xa5ed) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV cli/wvunpack.c:834 in main ==84257==ABORTING

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2022-2476?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `wavpack` | SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 5.4.0-150000.4.15.1 |
| `wavpack` | SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 5.4.0-150000.4.15.1 |
| `wavpack` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP3 | All versions | 5.4.0-150000.4.15.1 |
| `wavpack` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP4 | All versions | 5.4.0-150000.4.15.1 |
| `wavpack` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 4.60.99-5.12.1 |
| `wavpack` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 4.60.99-5.12.1 |
| `wavpack` | SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 4.60.99-5.12.1 |
| `wavpack` | openSUSE:Leap 15.3 | All versions | 5.4.0-150000.4.15.1 |
| `wavpack` | openSUSE:Leap 15.4 | All versions | 5.4.0-150000.4.15.1 |

Products: Fedoraproject Fedora, Wavpack Wavpack.

## How do I fix CVE-2022-2476?

Upgrade to a fixed version.

## Is CVE-2022-2476 being exploited?

There is no known exploitation of CVE-2022-2476 in the wild and no public exploit code.

## 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-2022-2476 and fix it if it is affected.

What it is: CVE-2022-2476 is a medium-severity vulnerability in Fedoraproject Fedora, published on 19 Jul 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-2476 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-2022-2476/ (Markdown: https://insights.sbomify.com/CVE-2022-2476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-2476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-2476
- OSV: https://osv.dev/vulnerability/CVE-2022-2476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-2476/
Summaries are generated and may contain mistakes; the official description above is the record.