# CVE-2026-29776: FreeRDP has an Integer Underflow in update_read_cache_bitmap_order Function of FreeRDP's Core Library


- **Severity:** Low 3.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 13 Mar 2026
- **Updated:** 16 Mar 2026
- **Also known as:** DEBIAN-CVE-2026-29776, GHSA-c747-x4wf-cqrr, OESA-2026-1716, UBUNTU-CVE-2026-29776

## What is CVE-2026-29776?

CVE-2026-29776 is a low-severity vulnerability in Freerdp Freerdp, published on 13 Mar 2026. 

### Official description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, Integer Underflow in update_read_cache_bitmap_order Function of FreeRDP's Core Library This vulnerability is fixed in 3.24.0.

Weakness: CWE-789 (Memory Allocation with Excessive Size Value), CWE-400 (Uncontrolled Resource Consumption), CWE-191 (Integer Underflow (Wrap or Wraparound)), CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-29776?

It affects 1 product.


Products: Freerdp Freerdp.

## How do I fix CVE-2026-29776?

Upgrade to a fixed version.

## Is CVE-2026-29776 being exploited?

There is no known exploitation of CVE-2026-29776 in the wild and no public exploit code.

## Other vulnerabilities in Freerdp Freerdp

- [CVE-2021-37594](https://insights.sbomify.com/CVE-2021-37594/): Other in n/a (critical 9.8)
- [CVE-2021-37595](https://insights.sbomify.com/CVE-2021-37595/): Other in n/a (critical 9.8)
- [CVE-2026-67305](https://insights.sbomify.com/CVE-2026-67305/): FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr (critical 9.4)
- [CVE-2026-66402](https://insights.sbomify.com/CVE-2026-66402/): FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass (critical 9.3)
- [CVE-2026-67289](https://insights.sbomify.com/CVE-2026-67289/): FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-29776 and fix it if it is affected.

What it is: CVE-2026-29776 is a low-severity vulnerability in Freerdp Freerdp, published on 13 Mar 2026. 
Exploitation: There is no known exploitation of CVE-2026-29776 in the wild and no public exploit code.

Affected product: Freerdp 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-2026-29776/ (Markdown: https://insights.sbomify.com/CVE-2026-29776/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-29776
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-29776
- OSV: https://osv.dev/vulnerability/CVE-2026-29776

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-29776/
Summaries are generated and may contain mistakes; the official description above is the record.