# CVE-2026-55645: xrdp: xrdp is an open source RDP server

CVE-2026-55645 is fixed in 5 products on 1 platform, first by FEDORA-2026-952A486B39, released July 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-55645
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0048
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 17, 2026

## Description

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service.This issue has been fixed in version 0.10.6.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xrdp Debian 12.15 (bookworm) | 0.9.21.1-1+deb12u3 | [DEBIAN-CVE-2026-55645](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55645.md) | Aug 1, 2026 |
| Linux | xrdp Debian 13.5 (trixie) | 0.10.1-3.1+deb13u2 | [DEBIAN-CVE-2026-55645](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55645.md) | Aug 1, 2026 |
| Linux | xrdp Debian 14 | 0.10.6.1-2 | [DEBIAN-CVE-2026-55645](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55645.md) | Aug 1, 2026 |
| Linux | xrdp Fedora 43 | 1:0.10.6.1-3.fc43 | [FEDORA-2026-952A486B39](https://patchblox.com/security/data/fix/linux/fedora-2026-952a486b39.md) | Jul 17, 2026 |
| Linux | xrdp-debuginfo Fedora 43 | 1:0.10.6.1-3.fc43 | [FEDORA-2026-952A486B39](https://patchblox.com/security/data/fix/linux/fedora-2026-952a486b39.md) | Jul 17, 2026 |
| Linux | xrdp-debugsource Fedora 43 | 1:0.10.6.1-3.fc43 | [FEDORA-2026-952A486B39](https://patchblox.com/security/data/fix/linux/fedora-2026-952a486b39.md) | Jul 17, 2026 |
| Linux | xrdp-devel Fedora 43 | 1:0.10.6.1-3.fc43 | [FEDORA-2026-952A486B39](https://patchblox.com/security/data/fix/linux/fedora-2026-952a486b39.md) | Jul 17, 2026 |
| Linux | xrdp-selinux Fedora 43 | 1:0.10.6.1-3.fc43 | [FEDORA-2026-952A486B39](https://patchblox.com/security/data/fix/linux/fedora-2026-952a486b39.md) | Jul 17, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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