Bug 2502985

Summary: CVE-2026-42218 xrdp: timing side-channel allows username enumeration [fedora-all]
Product: [Fedora] Fedora Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: xrdpAssignee: Bojan Smojver <bojan>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: bojan, mlewissmith, shngmao
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["a41cdae1-727e-4b9e-aefc-df5024c5cb84"]}
Fixed In Version: xrdp-0.10.6.1-3.fc44 xrdp-0.10.6.1-3.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-26 00:58:15 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2502926    

Description Guilherme de Almeida Suckevicz 2026-07-20 19:49:14 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure via username enumeration. This issue has been fixed in version 0.10.6.1.
Comment 1 Fedora Update System 2026-07-21 09:29:53 UTC 
FEDORA-2026-952a486b39 (xrdp-0.10.6.1-3.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-952a486b39
Comment 2 Fedora Update System 2026-07-21 09:30:17 UTC 
FEDORA-2026-9d3c766833 (xrdp-0.10.6.1-3.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-9d3c766833
Comment 3 Fedora Update System 2026-07-26 00:58:15 UTC 
FEDORA-2026-9d3c766833 (xrdp-0.10.6.1-3.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.
Comment 4 Fedora Update System 2026-07-26 01:16:56 UTC 
FEDORA-2026-952a486b39 (xrdp-0.10.6.1-3.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.