# CVE-2023-43114: Denial of service in n/a

> Loading a corrupted font via the GDI engine in Qt on Windows causes an application crash due to missing length checks.

- **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:** 18 Sep 2023
- **Updated:** 25 Sep 2024
- **Also known as:** GHSA-qqpv-296g-7w66, UBUNTU-CVE-2023-43114, openSUSE-SU-2024:13308-1

## What is CVE-2023-43114?

CVE-2023-43114 is a medium-severity denial of service vulnerability in Qt Qt, published on 18 Sep 2023. 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

An issue was discovered in Qt before 5.15.16, 6.x before 6.2.10, and 6.3.x through 6.5.x before 6.5.3 on Windows. When using the GDI font engine, if a corrupted font is loaded via QFontDatabase::addApplicationFont{FromData], then it can cause the application to crash because of missing length checks.

## Which versions are affected by CVE-2023-43114?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `libqt5-qtbase` | openSUSE:Tumbleweed | All versions | 5.15.11+kde134-1.1 |

Products: Qt Qt.

## How do I fix CVE-2023-43114?

Upgrade to a fixed version.

## Is CVE-2023-43114 being exploited?

There is no known exploitation of CVE-2023-43114 in the wild and no public exploit code.

## Other vulnerabilities in Qt Qt

- [CVE-2020-12267](https://insights.sbomify.com/CVE-2020-12267/): Use after free in n/a (critical 9.8)
- [CVE-2017-10904](https://insights.sbomify.com/CVE-2017-10904/): Command injection in Qt for Android (critical 9.8)
- [CVE-2011-3194](https://insights.sbomify.com/CVE-2011-3194/): Memory corruption in n/a (critical 9.3)
- [CVE-2022-40983](https://insights.sbomify.com/CVE-2022-40983/): Integer overflow in Qt (high 8.8)
- [CVE-2022-43591](https://insights.sbomify.com/CVE-2022-43591/): Memory corruption in Qt (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43114 and fix it if it is affected.

What it is: CVE-2023-43114 is a medium-severity denial of service vulnerability in Qt Qt, published on 18 Sep 2023. 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-2023-43114 in the wild and no public exploit code.

Affected product: Qt Qt. 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-2023-43114/ (Markdown: https://insights.sbomify.com/CVE-2023-43114/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43114
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43114
- OSV: https://osv.dev/vulnerability/CVE-2023-43114

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43114/
Summaries are generated and may contain mistakes; the official description above is the record.