Bug 2476965

Summary: CVE-2026-34003 tigervnc: X.Org X server: Information exposure and denial of service via out-of-bounds memory access [fedora-all]
Product: [Fedora] Fedora Reporter: Abhishek Raj <abhraj>
Component: tigervncAssignee: Jan Grulich <jgrulich>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: jgrulich
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["912d2570-dfb8-4369-8f41-6f5d72fb8ed4"]}
Fixed In Version: tigervnc-1.16.2-4.fc44 tigervnc-1.16.2-4.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-06-23 01:08:29 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: 2451113    

Description Abhishek Raj 2026-05-13 08:25:47 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.

Comment 1 Fedora Update System 2026-06-18 13:53:11 UTC
FEDORA-2026-ad10afa9cd (tigervnc-1.16.2-4.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ad10afa9cd

Comment 2 Fedora Update System 2026-06-18 13:53:20 UTC
FEDORA-2026-e7c97d043e (tigervnc-1.16.2-4.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-e7c97d043e

Comment 3 Fedora Update System 2026-06-19 01:40:08 UTC
FEDORA-2026-ad10afa9cd has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-ad10afa9cd`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-ad10afa9cd

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-06-19 19:01:32 UTC
FEDORA-2026-e7c97d043e has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-e7c97d043e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-e7c97d043e

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-06-23 01:08:29 UTC
FEDORA-2026-e7c97d043e (tigervnc-1.16.2-4.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-06-27 00:55:56 UTC
FEDORA-2026-ad10afa9cd (tigervnc-1.16.2-4.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.