# CVE-2021-28025: Integer overflow in n/a

> A local attacker can cause a denial of service in the Qt SVG library due to an integer overflow vulnerability.

- **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:** 11 Aug 2023
- **Updated:** 9 Oct 2024
- **Also known as:** DEBIAN-CVE-2021-28025, GHSA-3w9r-2mqj-cf5c, UBUNTU-CVE-2021-28025

## What is CVE-2021-28025?

CVE-2021-28025 is a medium-severity vulnerability in Qt Qt, published on 11 Aug 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

Integer Overflow vulnerability in qsvghandler.cpp in Qt qtsvg versions 5.15.1, 6.0.0, 6.0.2, and 6.2, allows local attackers to cause a denial of service (DoS).

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2021-28025?

It affects 1 product.


Products: Qt Qt.

## How do I fix CVE-2021-28025?

Upgrade to a fixed version.

## Is CVE-2021-28025 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-28025 exists.

## 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-2021-28025 and fix it if it is affected.

What it is: CVE-2021-28025 is a medium-severity vulnerability in Qt Qt, published on 11 Aug 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-28025 exists.

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-2021-28025/ (Markdown: https://insights.sbomify.com/CVE-2021-28025/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28025
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28025
- OSV: https://osv.dev/vulnerability/CVE-2021-28025

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28025/
Summaries are generated and may contain mistakes; the official description above is the record.