Bug 2502977 - CVE-2026-55626 xrdp: missing authentication when xrdp launches Xvnc in UNIX domain socket mode [fedora-all]
Summary: CVE-2026-55626 xrdp: missing authentication when xrdp launches Xvnc in UNIX d...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: xrdp
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Bojan Smojver
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["d5cc7e78-d713-43d5-a7cb-3...
Depends On:
Blocks: CVE-2026-55626
TreeView+ depends on / blocked
 
Reported: 2026-07-20 19:48 UTC by Guilherme de Almeida Suckevicz
Modified: 2026-07-26 01:16 UTC (History)
3 users (show)

Fixed In Version: xrdp-0.10.6.1-3.fc44 xrdp-0.10.6.1-3.fc43
Clone Of:
Environment:
Last Closed: 2026-07-26 00:57:58 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2026-07-20 19:48:12 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. In versions 0.10.6 and prior, when an authenticated user session is initialized using the Xvnc backend over UNIX domain sockets, the Xvnc process is launched with insufficient authentication mechanisms. A local authenticated attacker could exploit this vulnerability to bypass intended session isolation, allowing them to unauthorizedly view or control the active desktop sessions of other users on the same system. Users using other backends, such as xorgxrdp or Xvnc over TCP sockets, are not affected. This issue has been fixed in version 0.10.6.1.

Comment 1 Fedora Update System 2026-07-21 09:29:41 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 09:30:05 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 00:57:58 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 01:16:47 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.


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