# CVE-2020-28607: Memory corruption in libcgal

> A specially crafted malformed file can trigger an out-of-bounds read and type confusion in CGAL, potentially leading to code execution.

- **Severity:** Critical 10.0 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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:** Yes
- **Published:** 18 Apr 2022
- **Updated:** 23 Apr 2025
- **Also known as:** DEBIAN-CVE-2020-28607, GHSA-433c-4h47-r8gq, UBUNTU-CVE-2020-28607

## What is CVE-2020-28607?

CVE-2020-28607 is a critical memory corruption vulnerability in Debian Debian Linux, published on 18 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple code execution vulnerabilities exists in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1. A specially crafted malformed file can lead to an out-of-bounds read and type confusion, which could lead to code execution. An attacker can provide malicious input to trigger any of these vulnerabilities. An oob read vulnerability exists in Nef_2/PM_io_parser.h PM_io_parser<PMDEC>::read_face() set_halfedge().

Weakness: CWE-125 (Out-of-bounds Read), CWE-129 (Improper Validation of Array Index)

## Which versions are affected by CVE-2020-28607?

It affects 2 products.


Products: Cgal Computational Geometry Algorithms Library, Debian Debian Linux.

## How do I fix CVE-2020-28607?

Upgrade to a fixed version.

## Is CVE-2020-28607 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-28607 exists.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2020-28602](https://insights.sbomify.com/CVE-2020-28602/): Memory corruption in libcgal (critical 10.0)
- [CVE-2020-28603](https://insights.sbomify.com/CVE-2020-28603/): Memory corruption in libcgal (critical 10.0)
- [CVE-2020-28604](https://insights.sbomify.com/CVE-2020-28604/): Memory corruption in libcgal (critical 10.0)
- [CVE-2020-28605](https://insights.sbomify.com/CVE-2020-28605/): Memory corruption in libcgal (critical 10.0)
- [CVE-2020-28606](https://insights.sbomify.com/CVE-2020-28606/): Memory corruption in libcgal (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-28607 and fix it if it is affected.

What it is: CVE-2020-28607 is a critical memory corruption vulnerability in Debian Debian Linux, published on 18 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-28607 exists.

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-2020-28607/ (Markdown: https://insights.sbomify.com/CVE-2020-28607/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-28607
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-28607
- OSV: https://osv.dev/vulnerability/CVE-2020-28607

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-28607/
Summaries are generated and may contain mistakes; the official description above is the record.