# CVE-2023-0950: Array Index UnderFlow in Calc Formula Parsing

> An attacker can execute arbitrary code by tricking a user into opening a crafted spreadsheet with malformed formulas in LibreOffice.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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:** 25 May 2023
- **Updated:** 23 Apr 2025
- **Also known as:** DEBIAN-CVE-2023-0950, GHSA-qv23-hw3g-384q, UBUNTU-CVE-2023-0950

## What is CVE-2023-0950?

CVE-2023-0950 is a high-severity vulnerability in Debian Debian Linux, published on 25 May 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

Improper Validation of Array Index vulnerability in the spreadsheet component of The Document Foundation LibreOffice allows an attacker to craft a spreadsheet document that will cause an array index underflow when loaded. In the affected versions of LibreOffice certain malformed spreadsheet formulas, such as AGGREGATE, could be created with less parameters passed to the formula interpreter than it expected, leading to an array index underflow, in which case there is a risk that arbitrary code could be executed. This issue affects: The Document Foundation LibreOffice 7.4 versions prior to 7.4.6; 7.5 versions prior to 7.5.1.

Weakness: CWE-129 (Improper Validation of Array Index)

## Which versions are affected by CVE-2023-0950?

It affects 2 products.


Products: Debian Debian Linux, Libreoffice Libreoffice.

## How do I fix CVE-2023-0950?

Upgrade to a fixed version.

## Is CVE-2023-0950 being exploited?

There is no known exploitation of CVE-2023-0950 in the wild and no public exploit code.

## 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-2023-0950 and fix it if it is affected.

What it is: CVE-2023-0950 is a high-severity vulnerability in Debian Debian Linux, published on 25 May 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-2023-0950 in the wild and no public exploit code.

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-2023-0950/ (Markdown: https://insights.sbomify.com/CVE-2023-0950/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0950
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0950
- OSV: https://osv.dev/vulnerability/CVE-2023-0950

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0950/
Summaries are generated and may contain mistakes; the official description above is the record.