# CVE-2026-111881: FreeRDP 3.14.1 before 3.32.0 Integer Underflow in BMP Writer via Clipboard

> A malicious RDP clipboard peer can trigger an integer underflow in FreeRDP, causing a crash or out-of-bounds write via crafted BMP images.

- **Severity:** High 7.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 17 Oct 2026
- **Updated:** 19 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-111881, GHSA-27m7-gwhh-6hhf, GHSA-45g6-44vr-p7wm, UBUNTU-CVE-2026-111881

## What is CVE-2026-111881?

CVE-2026-111881 is a high-severity vulnerability in FreeRDP, published on 17 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

FreeRDP from 3.14.1 before 3.32.0 contains an integer underflow in the WinPR BMP writer, where a mismatched stride calculation passes SIZE_MAX - 3 to Stream_Zero for sub-byte images. A malicious RDP clipboard peer can return a crafted 1-bpp BMP processed by clipboard_synthesize_image_format_to_bmp for CF_DIB/CF_DIBV5, crashing the client or causing an out-of-bounds write.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2026-111881?


## How do I fix CVE-2026-111881?

Upgrade to a fixed version.

## Is CVE-2026-111881 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111881 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111881 and fix it if it is affected.

What it is: CVE-2026-111881 is a high-severity vulnerability in FreeRDP, published on 17 Oct 2026. An attacker can exploit it over the internet without logging in, 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-2026-111881 exists.

Affected product: FreeRDP. 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-2026-111881/ (Markdown: https://insights.sbomify.com/CVE-2026-111881/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111881
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111881
- OSV: https://osv.dev/vulnerability/CVE-2026-111881

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111881/
Summaries are generated and may contain mistakes; the official description above is the record.