Bug 2502803

Summary:	CVE-2026-15690 open62541: open62541: Denial of Service via crafted request [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	open62541	Assignee:	Jens Reimann <jreimann>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	low
Version:	rawhide	CC:	jreimann, thofmann
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["beaef331-ae09-4b42-8ae3-881fe08b5969"]}
Fixed In Version:	open62541-1.5.6-1.fc44 open62541-1.5.6-1.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-05 00:57:12 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:	2499970

Description Ganesh 2026-07-20 14:01:46 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.

A vulnerability was identified in open62541 up to 1.5.5. Affected by this issue is the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. Such manipulation of the argument Server_NamespaceArray leads to null pointer dereference. The attack can be executed remotely. The attack requires a high level of complexity. The exploitation is known to be difficult. The exploit is publicly available and might be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

Comment 1 Fedora Update System 2026-07-27 13:09:23 UTC

FEDORA-2026-23b21104ef (open62541-1.5.6-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-23b21104ef

Comment 2 Fedora Update System 2026-07-27 13:09:32 UTC

FEDORA-2026-1435f05fde (open62541-1.5.6-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-1435f05fde

Comment 3 Fedora Update System 2026-07-28 01:36:10 UTC

FEDORA-2026-23b21104ef 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-2026-23b21104ef`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-23b21104ef

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

Comment 4 Fedora Update System 2026-07-28 01:57:48 UTC

FEDORA-2026-1435f05fde 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-2026-1435f05fde`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-1435f05fde

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

Comment 5 Fedora Update System 2026-08-05 00:57:12 UTC

FEDORA-2026-23b21104ef (open62541-1.5.6-1.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 2026-08-05 01:10:50 UTC

FEDORA-2026-1435f05fde (open62541-1.5.6-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.