# CVE-2022-33047: Use after free in n/a

> A heap buffer overflow after free in OTFCC allows attackers to execute arbitrary code or cause denial of service via crafted font files.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jul 2022
- **Updated:** 9 Jul 2026
- **Also known as:** DEBIAN-CVE-2022-33047, ECHO-0686-51d9-9b76, GHSA-9wwr-74pw-r9j7

## What is CVE-2022-33047?

CVE-2022-33047 is a critical use after free vulnerability in Otfcc Project Otfcc, published on 6 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

OTFCC v0.10.4 was discovered to contain a heap buffer overflow after free via otfccbuild.c.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2022-33047?

It affects 1 product.


Products: Otfcc Project Otfcc.

## How do I fix CVE-2022-33047?

No fix has been published for CVE-2022-33047 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-33047 being exploited?

There is no known exploitation of CVE-2022-33047 in the wild and no public exploit code.

## Other vulnerabilities in Otfcc Project Otfcc

- [CVE-2022-35040](https://insights.sbomify.com/CVE-2022-35040/): Memory corruption in n/a (medium 6.5)
- [CVE-2022-35041](https://insights.sbomify.com/CVE-2022-35041/): Memory corruption in n/a (medium 6.5)
- [CVE-2022-35042](https://insights.sbomify.com/CVE-2022-35042/): Memory corruption in n/a (medium 6.5)
- [CVE-2022-35043](https://insights.sbomify.com/CVE-2022-35043/): Memory corruption in n/a (medium 6.5)
- [CVE-2022-35044](https://insights.sbomify.com/CVE-2022-35044/): Memory corruption in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-33047 and fix it if it is affected.

What it is: CVE-2022-33047 is a critical use after free vulnerability in Otfcc Project Otfcc, published on 6 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-33047 in the wild and no public exploit code.

Affected product: Otfcc Project Otfcc. 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-2022-33047/ (Markdown: https://insights.sbomify.com/CVE-2022-33047/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-33047
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-33047
- OSV: https://osv.dev/vulnerability/CVE-2022-33047

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-33047/
Summaries are generated and may contain mistakes; the official description above is the record.