Bug 2502984

Summary: CVE-2026-42218 xrdp: timing side-channel allows username enumeration [epel-all]
Product: [Fedora] Fedora EPEL 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: epel10CC: 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.el8 xrdp-0.10.6.1-3.el9 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-26 00:42:00 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 19:49:09 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 09:30:06 UTC 
FEDORA-EPEL-2026-ff63f3fb97 (xrdp-0.10.6.1-3.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-ff63f3fb97
Comment 2 Fedora Update System 2026-07-21 09:30:26 UTC 
FEDORA-EPEL-2026-a37b813cf3 (xrdp-0.10.6.1-3.el8) has been submitted as an update to Fedora EPEL 8.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-a37b813cf3
Comment 3 Fedora Update System 2026-07-26 00:42:00 UTC 
FEDORA-EPEL-2026-a37b813cf3 (xrdp-0.10.6.1-3.el8) has been pushed to the Fedora EPEL 8 stable repository.
If problem still persists, please make note of it in this bug report.
Comment 4 Fedora Update System 2026-07-26 16:32:36 UTC 
FEDORA-EPEL-2026-ff63f3fb97 (xrdp-0.10.6.1-3.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.